He’s played only two ATP World Tour matches but 18-year-old Mikael Ymer has already swept a former Top 10 player. The Swedish wild card dismissed Spaniard Fernando Verdasco 6-2, 6-1 on Tuesday, needing only 70 minutes to eliminate the left-hander from the If Stockholm Open.

Ymer impressed the Swedish crowd with poise of a more experienced, higher-ranked player, not what they might have expected from the World No. 549 who made his ATP World Tour debut a year ago in Stockholm (l. to A. Zverev). The right-hander saved all three break points faced and broke Verdasco for the fifth time to clinch the match, his first ATP World Tour victory. Ymer will have a tall task in round two. He faces 6’11” Ivo Karlovic, the third seed.

Ymer’s older brother, 20-year-old Elias Ymer, a member of the ATP Next Generation, was less fortunate. He fell to German qualifier Tobias Kamke 6-4, 6-0 after 65 minutes.

Spaniard Nicolas Almagro, another former Top 10 player, delivered 17 aces in a 3-6, 7-6(1), 6-3 comeback victory against Japanese Yuichi Sugita. Almagro saved seven of eight break points in the two-hour, 18-minute match and will next face John Isner or Juan Martin del Potro.

German Dustin Brown also came back to win, advancing past Gilles Muller 4-6, 6-3, 6-3. Brown will next meet Malek Jaziri of Tunisia or American Jack Sock, the sixth seed.

More than a million points of research. Every Top 100 player. It turns out that player development evolves from playing more points on serve to playing more points returning the further up the Emirates ATP Rankings you climb.

An Infosys ATP Beyond The Numbers analysis reveals a hidden element of our sport we have never fully grasped. The majority of the points you want to play are not on your own serve. You want your opponents to go deeper into their service games, where your chances of breaking serve steadily increase. You want to keep your own service games short and sweet.

The Infosys Information Platform uncovered that every single player in the Top 10 has played more return points than serve points since the beginning of the 2015 season. This massive data set is from the past 20 months and contains 1,143,932 points.

See the ATP Stats LEADERBOARDS powered by the Infosys Information Platform

Roger Federer led the pack, playing 52.6 per cent of his points returning. Second was World No. 1 Novak Djokovic at 52 per cent. They were the only two players in the Top 100 who reached the 52 per cent mark. The entire data set of 100 players scored in a four percentage point range, from around 48 per cent to 52 per cent.

Top 10 Breakdown: Percentage of Return vs. Serve Points

Dominic Thiem was the third ranked player in the Top 10 in this specific category. The 23-year-old Austrian moved from outside the Top 50 in the Emirates ATP Rankings in early 2015 into the Top 10 in June of this year.

Interestingly, World No. 3 Stan Wawrinka had the lowest rating of any player in the Top 10, playing just 50.1 per cent of points returning serve.

The further down the Top 100 list you move, the more you uncover players who play more points on their own serve, battling harder to hold serve, and not pressuring as much on their opponent’s service games.

Top 100 Breakdown: Percentage of Return vs. Serve Points

Overall, 58 per cent of the Top 100 play more points returning than serving. But there is a clear disparity between the Top 50 and the bottom 50. Seventy two percent of the top half play more return points than serve points, and that elevates to 90 per cent within Top 20. But the metrics are clearly different in the bottom half of the Top 100, with only 44 per cent of players playing more points on return.

Playing more points returning is something that higher ranked players achieve, but it’s also something that more experienced players seem to understand as well. When you look at the youth in the Top 100, there is an overwhelming majority of them who still play more points on serve.

For example, the only two players in the Top 20 who play more points serving than returning are the two youngest, 21 year old Nick Kyrgios and 22 year old Lucas Pouille. Bernard Tomic, Alexander Zverev, Kyle Edmund, Taylor Fritz and Jared Donaldson are young players in the Top 100 who are in the transition zone of trying to play more points on return than on their own serve.

Becoming more efficient on your own serve and making your opponent work harder on his serve makes perfect sense, and now we have the data to tie it to player development and your position in the Top 100 on tour.

Italian Paolo Lorenzi swept his countryman and lucky loser Federico Gaio 6-4, 6-4 on Tuesday to move into the second round at the VTB Kremlin Cup in Moscow. The seventh-seeded Lorenzi will next face another Italian in Fabio Fognini, who improved to 2-0 in his FedEx ATP Head2Head series against Ricardas Berankis by winning 6-1, 6-2 in 58 minutes.

Fognini leads his FedEx ATP Head2Head series against Lorenzi 2-1, but Lorenzi won the last time they played, on clay at the Monte-Carlo Rolex Masters earlier this season.

Sixth seed Pablo Carreno Busta prevailed against Austrian qualifier Jurgen Melzer 3-6, 6-3, 7-6(2) after two hours and 16 minutes. The Spaniard won 70 per cent of his first-serve points.

In a battle of Serbians, Dusan Lajovic earned two crucial service breaks to outlast Janko Tipsarevic 7-6(4), 6-4. “We are very good friends,” Lajovic said. “On court, we had to fight… I’m happy that I won. It’s always tough to play against a good friend.”

The 26-year-old Lajovic faces third seed Philipp Kohlschreiber in the second round. Russian qualifier Daniil Medvedev also advanced when Mikhail Kukushkin retired down 6-4, 4-0. Medvedev faces fourth seed Viktor Troicki next.

#NextGen Kyle Edmund squeaked by Croatian Illya Marchenko 7-6(7), 7-6(5) during his European Open debut on Tuesday in Antwerp. The 21-year-old Brit won 67 per cent of his service points and benefitted from 13 Marchenko double faults.

Edmund, who’s playing at a career-high No. 43 in the Emirates ATP Rankings, will next play second seed David Ferrer, who received a first-round bye.

Argentine Diego Schwartzman survived a tight contest as well, beating seventh seed Nicolas Mahut 7-6(2), 7-5. Schwartzman converted all four of his break points and will play #NextGen star Taylor Fritz or Belgian wild card Joris De Loore in the second round.

Romanian qualifier Marius Copil recorded only his fourth tour-level match win of the season by knocking out sixth seed Joao Sousa 4-6, 6-3, 6-3 in one hour and 48 minutes. Another qualifier, Jozef Kovalik, beat Guillermo Garcia-Lopez 6-3, 6-3. Elsewhere, Jan-Lennard Struff broke a two-match losing streak against Mikhail Youzhny by hitting 11 aces in a 6-7(3), 6-3, 6-0 win over two hours and 38 minutes.