SANTIAGO, Chile — Top-seeded home favorite Christian Garin retired from his Chile Open quarterfinal because of back pain after losing the first set of his quarterfinal match against Brazil’s Thiago Wild.
Wild led 7-6 (1) when Garin retired. Wild will face Argentina’s Renzo Olivo in the semifinals. Olivo beat sixth- seeded Hugo Dellien of Bolivia 3-6, 7-6 (5), 7-5 in the clay-court event.
Garin, the Rio Open winner Sunday, left the court looking upset after one hour of play as local fans clapped.
The Chilean had also struggled with back pain in his round-of-16 win against Spain’s Alejandro Davidovich Fokina.
Norway’s Casper Ruud and Spain’s Albert Ramos Vinolas will meet in the other semifinal.
The second-seeded Ruud topped Federico Delbonis of Argentina 7-5, 7-5, and the third-seeded Vinolas eliminated Brazilian Thiago Monteiro 6-4, 6-4.
TOKYO — Denis Shapovalov put up a near-perfect serving performance to beat Steve Johnson 6-3, 7-6 (3) at the Japan Open.
The seventh-seeded Canadian conceded only one point on his first serve and had 11 aces. Shapovalov, who lost in the semifinals four years ago, will next take on Japanese qualifier Rio Noguchi for a place in the quarterfinals.
“(This was) definitely one of my best serving matches,” Shapovalov said. “I kind of felt like I needed to against Steve . I’m very happy with my serving performance today and hopefully I can keep it up throughout the week.”
Also, Miomir Kecmanovic came back to beat Yoshihito Nishioka 2-6, 7-6 (1), 6-2, and Kwon Soon-woo defeated Mackenzie McDonald 6-3, 6-7 (4), 6-2.
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.