BASEL, Switzerland — With Roger Federer getting an unexpected day off Friday, his next opponent Stefanos Tsitsipas had to work hard to advance to the Swiss Indoors semifinals.
Third-seeded Tsitsipas rallied to beat Filip Krajinovic 3-6, 6-4, 6-4 in the quarterfinals, clinching when the 46th-ranked Serbian sent a service return long.
Tsitsipas was the main attraction Friday at Federer’s home town tournament after an all-Swiss quarterfinal became a walkover for Federer due to Stan Wawrinka withdrawing with a back injury.
Top-seeded Federer is seeking a 10th career title at Basel.
The other semifinal will pair unseeded Reilly Opelka and wild-card entry Alex de Minaur.
Big-serving Opelka sent down 31 aces in beating fourth-seeded Roberto Bautista Agut 6-3, 3-6, 6-3. The 37th-ranked American hit five of these aces consecutively to clinch the first set after trailing 0-40 with a 5-3 lead.
The 20-year-old de Minaur advanced past Jan-Lennard Struff 6-4, 7-6 (4).
ASTANA, Kazakhstan — Carlos Alcaraz’s first match as the No. 1-ranked player ended with a straight-set loss to David Goffin at the Astana Open.
The 19-year-old Spaniard lost 7-5, 6-3 in his first tour match since winning the U.S. Open and capturing the No. 1 ranking.
“David was playing really, really well. To come back to competition is never easy,” Alcaraz said. “It’s really tough for me, for my confidence.”
Alcaraz came from 5-2 down to level the first set at 5-5, only to be broken again by his Belgian opponent.
“When you play against the World No. 1 on a big stage, big crowd, the fire inside gives you so much power to play your best tennis because you don’t have any choice,” Goffin said. “You have to fight and give your best and that was the case today.”
Second-seeded Daniil Medvedev and No. 3-seeded Stefanos Tsitsipas both avoided similar upsets. Medvedev beat Albert Ramos-Vinolas of Spain 6-3, 6-1 and Tsitsipas ousted Kazakhstan’s Mikhail Kukushkin 6-3. 6-4.
OSTRAVA, Czech Republic — Fifth-seeded Daria Kasatkina defeated 2021 U.S. Open champion Emma Raducanu 7-5, 6-4 to advance to the second round of the Agel Open.
Kasatkina was playing her first match since losing in the first round of the U.S. Open and will next face Ekaterina Alexandrova.
Sixth-seeded Belinda Bencic of Switzerland rallied to eliminate former top-five player Eugenie Bouchard of Canada 6-7 (7), 6-1, while Aliaksandra Sasnovich upset eighth-seeded Jelena Ostapenko 6-2, 6-2.
American qualifiers Alycia Parks and Catherine McNally both advanced. Parks upset Czech Karolina Pliskova 6-0, 7-6 (3) and McNally eased past Anna Blinkova 6-1, 6-2 at the indoor hardcourt event in the Czech eastern city of Ostrava.