Iga Swiatek looked rusty on her return after two months out but the world number two rallied for a 4-6 7-5 6-2 win over Barbora Krejcikova to kick-start her WTA Finals title defence in Riyadh on Sunday.

ARYNA SABALENKA has been the best hardcourt player of the year, winning both Slams played on the surface. She’s got the best form coming in (20 wins from her last 21 matches) and has a strong record against her fellow elite players.

Iga Swiatek begins her bid to regain the world number one ranking with a comeback win over Barbora Krejcikova at the WTA Finals.

Most tennis fans did not know what to expect in Sunday's WTA Finals match between Iga Swiatek and Barbora Krejcikova. Swiatek had not played since the US Open and shook up her coaching staff, while Krejcikova had only won five matches since her Wimbledon title.

On Sunday, Barbora Krejcikova (No. 13 in the world) takes on Iga Swiatek (No. 2) in the Round Robin at the Akron WTA Finals Guadalajara. Watch tennis, other live sports and more on Fubo. Use our link to sign up for a free trial.

Iga Swiatek and Coco Gauff enjoyed winning starts to their WTA Finals campaigns in Riyadh on Sunday, albeit in contrasting fashion.

Iga Swiatek begins her bid to regain the world number one ranking with a comeback victory over Barbora Krejcikova, while Coco Gauff also wins at the WTA Finals.

Iga Swiatek kicked off her WTA Finals title defence with a hard-fought victory, rallying back from a set and a double-break down to overcome eighth-seeded Barbora Krejcikova in Riyadh on Sunday.