Top seeds Jannik Sinner and Daniil Medvedev are through to the next round of the Terra Wortmann Open in Halle, Germany.
Medvedev became just the third man born after 1990 to reach 400 wins with a straight-sets victory over Quentin Halys.
The world No. 3 won 6-2, 7-5 against the Frenchman, in what was just their second time facing each other.
Medvedev needed only 24 minutes to win the first set, but world No. 46 Halys did rally to push the Russian to a closer margin in the second set.
The win not only sets up a quarter-final match against either Stefanos Tsitsipas or Alex Michelsen on Friday but also sees the Russian reach the 400 wins mark. The 29-year-old became just the third man born in 1990 or later to reach the figure, joining Grigor Dimitrov and Alexander Zverev.
In terms of the all-time tally, Medvedev joins 96 other male players to have reached the tally over the history of tennis.
Jimmy Connors is the all-time leader, having won 1,274 matches, while Roger Federer is second with 1,251. Novak Dojokic is the highest of any active player, having won 1,154 matches in his career.
For Medvedev, the milestone represents a strong start to he grass court season, which has typically not been his preferred surface.
With 18 of his 20 titles coming on a hard court, Medvedev has reached two Wimbledon semi-finals but has won just one tournament on the surface, the 2021 Mallorca Championships.
Elsewhere, Sinner returned to action following his French Open final defeat with a 7-5, 6-3 win over Yannick Hanfmann.
Sinner, who will next face Alexander Bublik, said he was pleased to make a good start to the grass-court season.
“I’m very happy,” said Sinner after his win.
“He is a great server and a great baseliner, so breaking him is very difficult on this surface. I’m very happy how I handled the tough situations mentally. The first set could have gone into a tie-break and then anything can happen.
“I’m very happy about my performance. First matches are never easy on grass, and also second and third matches, so let’s see what’s coming in the next round. I think tomorrow I have the day off, which is good, because the body feels different on this surface. Let’s see how I’m going to react.”
