World number one Daniil Medvedev is through to the quarter-finals of the Halle Open after beating Ilya Ivashka in a routine straight-sets win.
Medvedev only played and defeated the Belarusian six days ago at the Rosmalen Grass Court Championships, and triumphed again as he came through in Germany 7-6 (7-4) 6-3.
After saving three set points to stay in the opening set, Medvedev sealed it on a tie-break, before easing through in the second.
"He is a great player," Medvedev said of Ivashka after the win. "He had a lot of bad luck with injuries at the beginning of the season. At the end of last season he was playing really great tennis.
"I've known him since I was very young, we actually played in Futures, Challengers, and on the ATP Tour. He beat me once in the Davis Cup, which is a really important tournament. So he knows how to play tennis, he knows how to play well on grass, so I'm really happy that two times in a row I managed to pass a tough test."
He will now play seventh seed Roberto Bautista Agut in the last eight after the Spaniard beat Tallon Griekspoor 6-7 (6-8) 6-4 6-2.
Eighth seed Karen Khachanov is also through after defeating Serbian Laslo Djere 7-6 (7-4) 6-4, and will face Oscar Otte after the German overcame Nikoloz Basilashvili 4-6 6-0 7-6 (7-3).
At the Queen's Club Championships, second seed Matteo Berrettini came from a set down to finally see off Denis Kudla, winning 3-6 7-6 (7-5) 6-4.
Defending champion Berrettini was troubled by the world number 82, and was just a tie-break away from suffering an upset, but the Italian came through as he belted down 22 aces in the match.
Berrettini faces Tommy Paul in the quarter-finals after the American beat Stanislas Wawrinka in straight sets, 6-4 6-1.
Ryan Peniston carried on from knocking out number one seed Casper Ruud by beating Francisco Cerundolo 6-0 4-6 6-4, setting up a last eight clash with Filip Krajinovic after he came from behind to defeat Sam Querrey 4-6 6-3 6-4.