Johanna Konta is the only Briton left in the Wimbledon singles after staging a determined comeback against American Sloane Stephens to reach the last 16.

The 2017 semi-finalist had trailed by a set and was under pressure on her serve before regrouping to win 3-6 6-4 6-1.

Compatriot Dan Evans had many chances against Portugal’s Joao Sousa but lost 4-6 6-4 7-5 4-6 6-4 in an epic battle.

Fellow Briton Harriet Dart was earlier overwhelmed 6-1 6-1 by Australian world number one Ashleigh Barty.

Konta will face Czech 2011 and 2014 champion Petra Kvitova for a place in the quarter-finals on Monday.

“I just kept plugging away more than anything,” Konta told BBC television.

“I was fully prepared to not be coming back in that second set because she really was playing well. I was really pleased I could keep battling, I was pleased I could mix things up and I did a good job in getting her out of that zone.”

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Konta turns frustration into fightback

Konta had dominated Stephens in a 6-1 6-4 victory in the French Open quarter-finals last month, playing some of the best tennis of her career.

But the 28-year-old struggled to find her rhythm and became frustrated with herself at times against the 26-year-old American on Court One.

After losing the first set when she netted a backhand, Konta found herself under increasing pressure on her serve in the second.

She showed glimpses of the mental negativity that has hampered her in the past, shooting glances at her coach Dimitri Zavialoff and berating herself for her wayward shots.

But she then translated that into fighting spirit in the fifth game of the second set when she was taken to deuce six times and saved three break points before eventually holding.

That proved to be the start of a comeback as she went on to break the American in the 10th game to take the set and force a decider.

From then on she did not look back – the overcooked forehands found the lines and the head-shaking at changeovers became fist pumps as she won five games in a row from late in the second set to surge ahead in the third.

And her victory was complete when Stephens hit long with just over two hours on the clock.

“I’m really pleased that I’ve been able to make it to the second week in two successive Grand Slams. I’ve never been able to do that before,” Konta said.

Evans lets chances slip

Evans had prepared for his third-round match by having a one-hour hitting session with 20-time Grand Slam champion Roger Federer on Friday and he started well with a break in the opening game.

He continued to put Sousa’s serve under pressure, carving out but failing to convert four other break points, and dominated to take the first set.

He went a break up early in the next two sets but both times allowed the Portuguese to get back into the sets with some excellent net play. Evans double-faulted to gift the second set to Sousa and then hit wide to hand over the third.

Evans again broke early in the fourth and let the advantage slip but this time he clawed his way back from brink when Sousa was one game from victory, delivering a cross-court forehand winner that sent the Court One crowd to their feet.

With the light fading, the new roof was closed on the court for the fifth set, and Evans once again went a break up but let that slip in the next game.

He went match point down on his own service game and with the clock ticking just past four hours, he netted to send Sousa into a last-16 encounter with 18-time Grand Slam champion Rafael Nadal.

“It is a hard one to take,” Evans, 29, said. “It’s just disappointing to lose such a tight one.”

He was keen to keep perspective, having enjoyed a successful grass-court season with two titles, and when asked how long it would take for him to get over the defeat he replied bluntly: “About 45 minutes.

“It is not the end of the world. It just hurts but what can I do? Feeling sorry for myself isn’t going to help.”

Dart learns ‘tough lesson’

Dart exits with her head held high after a tournament that marked her first back-to-back wins at tour level.

The world number 182 had said beforehand that the match against French Open champion Barty would provide her with a good measure of where her tennis was at.

Having lost 6-0 6-0 to Maria Sharapova in her last match against a high-profile player on a Grand Slam main show court at January’s Australian Open, she can be comforted by the fact she got herself on the scoreboard in the 53-minute defeat by Barty.

The Australian – who has been beaten by only one player outside the world’s top 10 this year – dropped just three points on serve in the first set, moving a double break up before the world number 182 was finally able to hold.

Dart went a double break down at the start of the second set before showing signs of her form of previous rounds, reaching four break points before allowing Barty to hold.

“It’s a good learning curve for me,” she said. “She played great. She didn’t let me in the match at all.

“It’s a tough lesson to learn. It’s been a great tournament for me. I should take a lot of positives from it.”

Barty, who is the first Australian to reach the women’s singles fourth round at Wimbledon since 2010, said the young Briton had a bright future.

“Harriet is going to have a fantastic career. I know she will play out on Centre Court again soon,” said the Australian, who will play American Alison Riske in the fourth round.

During Wimbledon, six-time Grand Slam doubles champion Jamie Murray is writing a column for BBC Sport. In his second, he discusses his mixed start to the tournament, brother Andy’s partnership with Serena Williams, and his ambition to help the tennis stars of the future.

My men’s doubles partner Neal Skupski and I lost in the first round of Wimbledon on Friday and it was a disappointing result. We got outplayed by Ivan Dodig and Filip Polasek and lost 2-6 7-6 (7-2) 3-6 6-1 6-4.

Those guys played really well. They played very aggressively and were serving big, so we just got overrun a bit, which was unfortunate.

Play had started on Thursday but was suspended because of bad light, and it was disappointing for us not to be able to finish the match then because we were looking stronger, but that was just bad luck on our part and it didn’t work out so well for us.

Unfortunately, it was just one of those things. It’s only really at Wimbledon that it happens – at other tournaments, it only occurs if there are strong winds or you get rain. It’s happened to me a few times before and it is never ideal because you have to start again from scratch; it’s a new day, new feelings.

It also gives the players of both teams time to speak to their coaches, and to get a better handle on what has been happening in the match.

It changes the momentum in a way because it’s a fresh start. We were just unlucky because I think we were the only court that didn’t finish that night.

Neither Neal nor I felt that we did a lot wrong. It’s a new partnership and I think we both felt good together on the court.

We didn’t have great results instantaneously but that doesn’t mean we’re not going to be a good team and have a successful partnership going forward. We haven’t lost any belief at all in the team. We just have to look ahead now and prepare for the hard court season.

• Jamie Murray progresses in mixed doubles but goes out of men’s competition

‘I’m really happy we won our mixed doubles opener’

Later on Friday afternoon, I had my first round mixed doubles match with my partner Bethanie Mattek-Sands. We beat Joe Salisbury and Katy Dunne 7-5 7-6 (10-8) but it took me a little while to get going because it was pretty soon after the disappointment of the men’s doubles.

Bethanie is great fun, a great character and a great player as well, and she’s a good partner to have in that situation. I was really happy that we were able to get the win and hopefully we will have a good few matches together over the next week.

Moving from clay to grass takes a bit of adjusting. On clay, you’re sliding around, the ball is bouncing up and you’re having to play a lot of balls around shoulder height.

But then you get on grass and you need a lot of small adjustment steps. The ball is bouncing lower so you are using a lot of different, smaller muscles and you need a stability that maybe you don’t need on other surfaces.

You’re able to move the ball around a lot more too. On serve, you can swing the ball a lot more so you get a lot more help from the grass courts than you would on other courts.

I prefer playing on hard courts; that is where I have had all my best results throughout my career. I do like playing on grass, but it’s such a short season and sometimes it feels like it’s over before it’s even started.

‘Andy and Serena playing together is unique’

I think it’s really cool that Andy has partnered up with Serena Williams in the mixed doubles. We didn’t speak about it before it was announced, but it’s great for the event because it puts it in the spotlight a lot more than it normally would be.

You’ve got two greats of the game competing with each other. We never get that at a Grand Slam, so it’s a unique situation.

Hopefully, they can compete hard and play until the end of the tournament because it would be great for the event of mixed doubles.

There was a lot of build-up pre-match and it was fun to see them playing in front of a packed Centre Court on Saturday night.

‘I want to coach when I finish playing’

I have recently launched a YouTube channel because I wanted to document my life as a tennis player, because it’s a very unique life that we live.

I wanted to showcase all the things we have to go through in our daily lives that the public wouldn’t see. They see us on TV hitting tennis balls but they don’t necessarily see what goes into getting us onto the match court in terms of the preparation.

There will also be a lot of instructional videos going up, with tips, advice and tactics on the game, and on training. Singles and doubles are very different and I just thought it would be interesting for people to see how we train.

I would like to coach once my playing career is over, but whether I would like to coach on the Tour, I’m not sure, because I have been travelling for so long.

I would like to help some of the younger players in our country. Not a lot of people have made it to the top of the game and can therefore share their experiences. I certainly feel that’s something I would be passionate and enthusiastic about.

Jamie Murray was speaking to BBC Sport’s Katie Falkingham at Wimbledon.

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Roger Federer and Rafael Nadal reached the fourth round at Wimbledon with straight-set victories over French opponents.

Spanish world number two Nadal – a two-time winner at SW19 – defeated Jo-Wilfried Tsonga 6-2 6-3 6-2.

Eight-time Wimbledon champion Federer beat Lucas Pouille 7-5 6-2 7-6 (7-4).

Nadal will play Britain’s Dan Evans or Portugal’s Joao Sousa in the next round while Federer will take on Italy’s Matteo Berrettini.

It was the first time Nadal had played Tsonga at the All England Club and their first meeting since 2015.

“I’m very happy. I think I played a great match,” Nadal told BBC Sport.

“I was returning well, playing aggressively with the forehand and the backhand. I think I did a lot of things well.

“Tsonga is someone you don’t want to face in the third round at Wimbledon.

“Every single day is a battle here. It is not a surface I play a lot of matches on during the year.”

Victory over Pouille saw Federer become the first player to achieve 350 Grand Slam singles match wins.

“It was tough. It was a hard-fought match, especially in the first set,” Federer said.

“I think going up two sets was key. The third was tough, it was very even.

“There is always a relief winning a third-set breaker because if it goes the wrong way, you might be here for a few more hours.”

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Nadal in stylish victory

In his first meeting with Frenchman Tsonga at a Grand Slam in 11 years, Nadal secured an early break to move 4-1 ahead and made just three unforced errors throughout the opening set.

The second set stayed with serve until Nadal broke to lead 4-2, and he almost sealed the set on a break before Tsonga fought back to force him to serve out for a 2-0 advantage.

Nadal dominated the third set, gaining a double break, and he almost broke Tsonga yet again on his third match point but the two-time Wimbledon semi-finalist was able to hold.

However, Nadal quickly served out the match to love in one hour 48 minutes, with Tsonga seemingly nursing a hand injury after a tumble earlier in the game.

Federer made to sweat by Pouille

Federer was meeting Pouille for the first time at a Grand Slam and the first set proved a cagey affair, staying on serve with the Frenchman scuppering two break points.

But it was Federer who finally broke serve and he did it at the perfect time, sealing the opening set on his second set point.

The second set proved the polar opposite, however, with Federer sealing a double break early on to go 4-0 up before failing to hold his own serve.

Just as he did in the opener, he won the set on a break to move just one away from a place in the fourth round.

Little could separate the two in the third set with Federer missing match point as Pouille held to take the set to a tie-break, which Federer won.

Elsewhere, eighth seed Kei Nishikori beat American Steve Johnson 6-4 6-3 6-2.

Tennys Sandgren defeated Fabio Fognini 6-3 7-6 (14-12) 6-3 and will play American compatriot Sam Querrey next after he beat John Millman in straight sets.

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