Stefanos Tsitsipas wins first match in Hamburg

Stefanos Tsitsipas wins first match in Hamburg

Top seed Stefanos Tsitsipas of Greece needed a first-set tiebreak but then handled business against Germany’s Dominik Koepfer, winning 7-6 (2), 6-3 on Wednesday at the Hamburg European Open in Germany.

It marked Tsitsipas’ first match since being upset in the first round at Wimbledon by American Frances Tiafoe. He won 86 percent (30 of 35) of his first-serve points en route to securing his tour-best 40th win of the season.

Tsitsipas advanced to the quarterfinals to face Serbian No. 6 seed Filip Krajinovic, who outlasted German wild card Philipp Kohlschreiber 7-5, 4-6, 6-3 on Wednesday. Fellow Serbian Laslo Djere also notched another win, defeating Brazil’s Thiago Seyboth Wild 7-6 (1), 6-1.

American No. 2 seed Sam Querrey fell to countryman Maxime Cressy on Wednesday, one of four seeded players to bow out in Newport, R.I.

Cressy won 6-4, 2-6, 6-2 in the pair’s first career head-to-head match. He is joined in the quarterfinals by two other Americans: Jenson Brooksby, who defeated fellow American Denis Kudla, and Jack Sock, who upset No. 3 seed Yoshihito Nishioka 6-2, 6-3.

German Peter Gojowczyk knocked out Canadian No. 4 seed Vasek Pospisil 6-3, 6-3, and Jason Jung of Chinese Taipei beat American No. 5 seed Tennys Sandgren 6-2, 6-2.

No. 1 seed Alexander Bublik of Kazakhstan needed three sets to avoid following his fellow seeded players out the door. He beat Croatia’s Ivo Karlovic 7-6 (5), 4-6, 6-1. No. 7 seed Jordan Thompson of Australia and No. 8 seed Kevin Anderson of South Africa also advanced.