Top-ranked Aryna Sabalenka put on a dominant serving display in her opening match at the WTA finals, producing 10 aces in a 6-3, 6-1 win over No. 8-ranked Jasmine Paolini on Sunday. Sabalenka served four aces in the final game of the first set alone and overall put 82.

The WTA Finals are underway, and reigning US Open champion Aryna Sabalenka is off to an impressive start with her Round 1 performance.

Aryna Sabalenka was close to suffering back-to-back defeats to Jessica Pegula before pulling off a third-set comeback to beat the world No. 5 6-4 2-6 6-4 and improve to 2-0 at the WTA Finals in Riyadh.

World number one Aryna Sabalenka enters "beast mode" to defeat Jessica Pegula and close in on a place in the knockout stages of the WTA Finals.

Aryna Sabalenka, the top-ranked player in women’s professional tennis, will face men's No. 652 Nick Kyrgios in a match touted as the fourth Battle of the Sexes in the sport’s history.