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