Aryna Sabalenka takes down American Sofia Kenin at Tianjin Open

Fourth seed Aryna Sabalenka took down American Sofia Kenin 7-6(4) 4-6 6-0 in the first round of the Tianjin Open on Tuesday, as the Belarusian maintains her slim hopes to secure a spot at this month's WTA Finals.

Every win in the WTA international tournament counts for Sabalenka, who along with Karolina Pliskova, Sloane Stephens, Elina Svitolina and Kiki Bertens, is fighting for the three available spots left for the season-ending event in Singapore.

Wuhan Open winner Sabalenka, currently 10th in the Race to Singapore leaderboard, must win in Tianjin this week, and also needs help from other results from Pliskova and Bertens to keep her qualifying bid alive.

Sabalenka recovered from an early break down in the opening set and saved three break points at 5-5 before winning the tiebreak.

A lapse in concentration cost Sabalenka the second set, but she roared back in style to drop only four points in the final five games of the match.

The 20-year-old is up against Poland's Magda Linette in the second round, who collected a win over Evgeniya Rodina in three sets on Monday.

Earlier in the day, Britain's Katie Boulter produced a sparkling display to upset eighth seed Maria Sakkari 7-6(4) 6-3.