No. 6 seed Filip Krajinovic of Serbia knocked out top-seeded Greek Stefanos Tsitsipas 3-6, 6-1, 6-3 Friday in the quarterfinals of the Hamburg European Open in Germany.
Despite Tsitsipas smashing 11 aces compared to Krajinovic's one, Krajinovic fared better on first serves won with a 76 percent success rate (31 of 41). Krajinovic also converted on five of eight break-point opportunities.
No. 2 seed Pablo Carreno Busta of Spain advanced past Serbian No. 5 seed Dusan Lajovic 7-6 (4), 6-3. Another Serb, Laslo Djere, upset Georgian No. 3 seed Nikoloz Basilashvili 6-2, 6-2, and Argentina's Federico Delbonis defeated No. 8 seed Benoit Paire of France 4-6, 7-6 (9), 6-4.
Hall of Fame Open
Seventh seed Jordan Thompson of Australia and Jenson Brooksby of the US reached the semi-finals of the Hall of Fame Open at Newport, Rhode Island, on Friday.
Thompson defeated American Maxime Cressy 6-3, 7-6 (6). Brooksby cruised past Peter Gojowczyk of Germany 6-0, 6-3.
The winners will meet in one semi-final match Saturday. No. 1 seed Alexander Bublik of Kazakhstan and No. 8 seed Kevin Anderson of South Africa will square off in the other.
Federico Coria of Argentina took down Chilean No. 2 seed Cristian Garin 6-4, 4-6, 6-2 Friday in the quarter-finals of the Nordea Open at Bastad, Sweden.
The match needed more than 2 1/2 hours to decide a winner, but Coria earned the edge by converting six of 13 break-point opportunities while saving five of nine break points.
Spain's Roberto Carballes Baena and Germany's Yannick Hanfmann were also victorious, while No. 1 seed Casper Ruud of Norway advanced via walkover when Switzerland's Henri Laaksonen withdrew.