Australian Open champion Sabalenka loses in Dubai on return to action

Australian Open champion Aryna Sabalenka fell to a 6-7(5) 6-3 6-0 second-round defeat by Donna Vekic on her return to action at the Dubai Tennis Championships on Tuesday.

Sabalenka, who won her second Grand Slam title at Melbourne Park last month, looked on track for a routine victory after the Belarusian edged a tight opening set and grabbed an early break in the next but Vekic had other ideas.

The Croatian, who came into the contest having won five of her previous seven meetings with the world number two, was one point away from going 3-0 down in the second set but came up with a superb sliced winner from deep to draw level at deuce.

It proved to be the turning point of the match as Vekic won 12 of the next 13 games to secure the victory and set up a clash with Sorana Cirstea, who beat Veronika Kudermetova 6-1 6-4.

"At all times I didn't give up," said the 27-year-old Vekic, who is ranked 31 in the world. "I didn't stop believing I could win. I just kept fighting.

"I told my coach I'm taking this week as half holidays. I can tell you I spent more time on the beach than on the court. Maybe that's a good way going forward."

Wimbledon champion Marketa Vondrousova was made to work hard by American Peyton Stearns before sealing a 6-1 5-7 6-2 victory, before in-form former French Open champion Jelena Ostapenko eased past Swiss Lulu Sun 6-3 6-3.

Brisbane and Abu Dhabi champion Elena Rybakina advanced to the round of 16 after former world number one Victoria Azarenka was forced to retire with an injury before the third set after her Kazakh opponent levelled the match at 4-6 6-2.

Eighth seed Maria Sakkari snapped a run of three straight defeats with a 6-2 6-4 win over American Emma Navarro and will take on Jasmine Paolini, who beat