What Coco Gauff, Aryna Sabalenka and Jessica Pegula…

What Coco Gauff, Aryna Sabalenka and Jessica Pegula need to qualify at WTA Finals

Aryna Sabalenka defeated Jessica Pegula in three sets - (AP)

Coco Gauff, Aryna Sabalenka and Jessica Pegula head into the final day of the WTA Finals round-robin stage all with a chance of reaching the semi-finals.

Defending champion Gauff defeated Jasmine Paolini in straight-sets to keep her chances alive, as World No 1 Sabalenka made her second win with her three-set victory over Pegula.

Gauff plays Sabalenka in the final group match on Thursday, in what is their first meeting since the French Open final in June. Before then, Pegula will face the already-eliminated Paolini, who has been struggling with illness.

Elena Rybakina has advanced as the group winner in the other round-robin, with Amanda Anisimova joining her after her battling win over Iga Swiatek on Wednesday.

WTA Finals: The results so far

Sabalenka began her bid for a first WTA Finals title with a 6-3 6-1 victory over Paolini. Pegula then defeated Gauff 6-3 6-7 6-2, as the defending champion struggled with her serve and forehand.

Gauff responded with a 6-3 6-2 win over Paolini, before Sabalenka rallied to defeat Pegula 6-4 2-6 6-3. The set won by Pegula, though, could make all the difference.

WTA Finals: Who needs what to qualify?

If Pegula and Sabalenka win

Sabalenka goes through as group winner, Pegula as runner-up

If Pegula and Gauff win

If Gauff and Pegula win in straight-sets, Sabalenka will be out. If Pegula wins in straight-sets and Gauff wins in three, qualification will be determined by the number of games won across the round-robin.

Gauff wins in 2 + Pegula wins in 2 = 1. Gauff, 2. Pegula

Gauff wins in 3 + Pegula wins in 2 = Determined by % of games won

Gauff wins in 2 + Pegula wins in 3 = 1. Gauff, 2. Sabalenka

Gauff wins in 3 + Pegula wins in 3 = 1. Gauff, 2. Sabalenka

If Paolini and Sabalenka win