Defending champion and top seed Alexander Bublik of Kazakhstan advanced to the quarterfinals of the Generali Open in Kitzbuhel, Austria, on Wednesday.
He defeated Argentina's Facundo Diaz Acosta 6-3, 7-5 in 79 minutes.
Bublik, ranked No. 11 in the ATP rankings, delivered eight aces and saved one break point during the match.
He will next play Slovakia's Alex Molcan, who beat Germany's Daniel Altmaier 6-3, 3-6, 7-5.
Upsets and Other Results
Former 2023 champion Sebastian Baez of Argentina upset third-seeded French player Arthur Rinderknech 7-6 (6), 2-6, 6-4.
France's Quentin Halys also surprised second-seeded Valentin Vacherot of Monaco 6-3, 6-4.
Fourth-seeded Argentine Tomas Martin Etcheverry defeated Austrian home favorite Jurji Radionov 6-2, 7-6 (4).
Fifth seed Ignacio Buse of Peru recovered from a set down to beat Switzerland's Kilian Feldbausch 2-6, 6-2, 6-2.
Sixth-seeded German Jan-Lennard Struff lost 6-0, 6-3 to Argentina's Mariano Navone. German veteran Yannick Hanfmann defeated Argentina's Marco Trungelliti 6-4, 7-6 (2).
Wild card Tiago Torres scored his second upset in three days by eliminating third seed Alejandro Tabilo of Chile 6-4, 6-4.
The 24-year-old Portuguese player, ranked No. 427, saved seven of eight break points. He will face France's Hugo Gaston, who beat Tirouan Droguet 6-0, 6-3.
Belgian fourth seed Alexander Blockx secured a 3-6, 6-4, 7-6 (4) victory against Kyrian Jacquet of France.
Fifth-seeded Nuno Borges lost 6-1, 4-6, 6-3 to Argentina's Roman Andres Burruchaga.
