Canada's Shapovalov retires from Japan Open quarterfinal vs. Alcaraz due to injury

Canada's Denis Shapovalov is out of the Japan Open.

The Richmond Hill, Ont., lost by way of walkover to top-seeded Spaniard Carlos Alcaraz after having to retire from their quarterfinal match due to injury on Sunday in Tokyo.

Alcaraz was leading 7-6 (3), 2-1 when Shapovalov retired.

Shapovalov converted on three of his four break-point chances by that point, while saving four of Alcaraz's seven opportunities.

Shapovalov was coming off a three-set win over Chile's Alejandro Tabilo.

Alcaraz will next face Spanish qualifier Jaume Munar in the semifinals.

Second-ranked Aryna Sabalenka was bundled out in the third round of the China Open in straight sets by the Czech Republic's Nikola Bartunkova on Sunday.

The No. 34-ranked Bartunkova defeated the four-time Grand Slam champion 6-4, 6-3 in just over an hour and a half leaving the tournament without its two top seeds in the first week.

Newly-crowned world No. 1 Elena Rybakina was ousted from the tournament on Saturday and will now be joined by Sabalenka in exiting WTA-1000 event in Beijing early.

Sabalenka, who was denied a three-peat at the U.S. Open last month by Rybakina, squandered five break points in the first set as her historic struggles in Beijing continued. The 28-year-old Belorussian has never progressed past the quarterfinals at the event.

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"First of all, I focused on myself, to be calm," Bartunkova said. "And Aryna, she's great, she's a legend, she's a Grand Slam champion. So, yeah, I'm really happy that I won the match ... I'm not a girl who celebrates too much."

Bartunkova will next play 24-year-old Sinja Kraus of