Roger Federer feels at home as one of the sport’s greatest players to step onto a grass court.

The Swiss, who is returning to tour-level play this week at the Mercedes Cup in Stuttgart, has won 15 tour-level titles on the surface, including seven at Wimbledon and eight in Halle. He’s also finished as a runner-up six times on grass.

The 34 year old’s double-digit haul puts him at the top of the career grass-court FedEx ATP Win-Loss Index for the Open Era (since May 1968). Federer, who won his first grass-court title at 2003 Halle, boasts a 142-20 record on the surface (as of 8 June 2016), giving him a staggering winning percentage of 88.

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The World No. 3 has dealt with injuries this year, including torn cartilage in his left knee that required surgery and an ailing back that forced him to miss Roland Garros for the first time since 1998. But playing in Stuttgart for the first time this week, Federer remains hopeful he can get on another grass-court run.

“A good week is if I get on the match court and I play a match. A great week is if I get to the semis, and a dream one would be to win the tournament,” Federer said. “Crazier things have happened. I think everything’s possible this week. At the moment, I step on a grass court and I’m feeling somewhat fine. I will have my chances and I’m looking forward to that challenge.”

GREAT ON GRASS – Roger Federer leads the FedEx ATP Win-Loss Index with the best winning percentage in grass-court matches. From 2003 to 2008, he won 65 straight grass-court matches and he lifted 15 titles from 21 grass-court finals. Take a look at his season-by-season tally.

Right behind Federer in the grass-court FedEx ATP Win-Loss Index is another great, John McEnroe. The New Yorker posted a 121-20 career record on the turf, equalling a winning percentage of 86. He, like Federer, also has his share of Wimbledon and other grass tour-level titles. The left-hander won three grass-court titles in south-west London and five others elsewhere. He was also a finalist on the surface five times.

Bjorn Borg, well-known for his clay-court prowess, comes in third on the all-time list with a 61-11 record, a winning percentage of 85. The Swede, who won six Roland Garros titles, also captured five Wimbledon crowns and one other grass-court title.

The remainder of today’s “Big Four” are close behind the aforementioned three. Andy Murray is nearly even with Borg. The Brit possesses a 90-17 record on grass, translating to a winning percentage of 84. The World No. 2 also has won six titles, including 2013 Wimbledon, when he became the first British man to win the championship since Fred Perry in 1936.

Novak Djokovic, a three-time Wimbledon champion, carries a 67-15 career grass-court record and a winning percentage of 82 into this season’s grass stretch. Next month, Djokovic will try to win his third consecutive Wimbledon title.

Rafael Nadal has won four grass-court titles and is 58-17 on the surface for his career, a winning percentage of 77. Last year, the Spaniard added the inaugural Mercedes Cup on grass to his two Wimbledon titles and one title at The Queen’s Club.

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Mercedes Cup – Stuttgart, Germany

Roger Federer and Tommy Haas went to new heights to launch the Mercedes Cup. The longtime friends visited the tallest building in Stuttgart for a hit on a mini court. Read & Watch or View Gallery

Bob Bryan and Mike Bryan (View Photo) and Michael Berrer (View Photo) were among the stars to participate in kids’ day activities, meeting young fans and signing autographs (while trying German sausages!).

Marin Cilic attended a meet-and-greet with guests of the FedEx suite, while both he and Gilles Simon met guests at the Emirates suite.

Federer, Dominic Thiem, Philipp Kohlschreiber, Feliciano Lopez, Viktor Troicki and the Bryans attended the player party Tuesday night at Zum Heurigen, a trendy restaurant that served fine Swabian and Austrian cuisine.

Ricoh Open – ‘s-Hertogenbosch, The Netherlands

Nicolas Mahut, Robin Haase, Igor Sijsling and Rohan Bopanna were among the stars to attend the players’ dinner at Hotel Nuland. The pros were treated to a relaxing barbeque in the garden, entertainment from a DJ and dancing.

David Ferrer signed autographs during sponsor visits with Emirates and Ricoh. View Photo

Jean-Julien Rojer (View Photo) was put on the spot for a kids’ day press conference, answering questions from aspiring young Dutch tennis players. Aljaz Bedene, Raven Klaasen, Dominic Inglot, Wesley Koolhof and Matwe Middelkoop also participated in kids’ day clinics.

Top seeds Bob Bryan and Mike Bryan started their grass-court season quickly on Wednesday at the MercedesCup in Stuttgart. The American twins needed just 42 minutes to beat Denis Istomin of Uzbekistan and Illya Marchenko of Ukraine 6-3, 6-1.

The Bryan brothers, who were finalists on Saturday at Roland Garros, have won 112 tour-level titles together, but none at Stuttgart, which switched from clay to grass last year. In fact, this week marks the first time the Bryans have played at an ATP World Tour event in the German city.

They’ll next face Aussie Sam Groth and Swede Robert Lindstedt in the quarter-finals.

Top Seeds Advance In ‘s-Hertogenbosch

Top seeds Rohan Bopanna/Nicolas Mahut defeated Guillermo Garcia-Lopez and Robin Haase 6-1, 6-4 in the first round of the Ricoh Open. Mahut, who took over the No. 1 spot in the Emirates ATP Doubles Rankings on Monday, had defeated countryman Paul-Henri Mathieu in singles play earlier in the day. Bopanna/Mahut dropped only three points on their first serve, did not face a break point and advanced in just 50 minutes.

In the quarter-finals, the top seeds will face Gilles Muller/Frederik Nielsen, who saw off Marcelo Demoliner and Nicholas Monroe 6-3, 6-3. Muller/Nielsen fired eight aces and saved both break points faced.

Roger Federer enjoyed a graceful return to the ATP World Tour on Wednesday before rain stopped his second-round match at the MercedesCup in Stuttgart.

The top seed was up a break on #NextGen star Taylor Fritz 4-3 in the first set. At 30/30, 3-3, Federer struck a strong service return that Fritz hit into the net. Facing his first break point of the match, the 18-year-old then double faulted.

Minutes later, at about 5:25 p.m. local time, rain started to fall. Play was later suspended for the day, with Federer and Fritz scheduled to resume not before 12: 30 p.m. local time on Thursday.

Unfortunately we can’t play today anymore, too much of this stuff ?☁️?⛈?☂☔️
See you tomorrow @MercedesCup pic.twitter.com/zXlYfpEc5Q

— Roger Federer (@rogerfederer) June 8, 2016

Federer, who was playing his first match since losing to Dominic Thiem in Rome on May 12, showed no signs of a lingering back injury that forced him to withdraw from Roland Garros. The No. 3 player in the Emirates ATP Rankings moved from side to side without issue and freely approached the net on Center Court in Stuttgart. The 34 year old also didn’t have to ease up on any balls like he had to last month in Rome.

Despite the early break, Fritz also looked ready for the occasion and didn’t appear starstuck by playing a childhood idol. He spoke on Tuesday about what it would be like to face Federer.

“It’s amazing being able to play the next round, because growing up, Federer was the guy that nobody could beat,” Fritz said after his first-round win. “I grew up in that generation of him just dominating, so it’s crazy now to be stepping on the court with him.”

The American also shared a memory of watching Federer play Juan Martin del Potro for the US Open title in 2009.

“I remember I was in fifth grade in my computer class. We were supposed to be doing some kind of assignment and I was live streaming the US Open final, Federer versus del Potro. Sitting there then, I never thought that at the same tournament I’d be playing against Federer…”

Thursday’s winner will face German qualifier Florian Mayer, who beat Stuttgart’s Michael Berrer 6-3, 3-6, 6-4 before the rain fell.

Top German Philipp Kohlschreiber also advanced to the quarter-finals for the second consecutive year, overcoming Denis Kudla 7-5, 6-3. The seventh seed erased four of five break points but needed four match points to put away the 23-year-old American, who was trying to reach his first quarter-final since last year at the BB&T Atlanta Open.

“[I’m] very happy with the transition from clay to grass… Today [I had] a tough opponent. Denis Kudla played a fantastic grass-court season last year,” Kohlschreiber said of Kudla, who won an ATP Challenger Tour event and reached the fourth round of Wimbledon last year on grass.

Kohlschreiber, No. 26 in the Emirates ATP Rankings, will face second seed Marin Cilic or Czech qualifier Radek Stepanek, who was two points away from knocking out Andy Murray in the first round of Roland Garros.

“It’s a very strong tournament,” Kohlschreiber said. “I’m happy I put myself in a great position, and I know if I play well in the quarters I can reach the semis or even more.”