American star Coco Gauff defeated world No. 2 Iga Swiatek 6-3, 6-4 on Tuesday, sealing her spot in the semifinals of the year-end WTA Finals in Riyadh, Saudi Arabia.

Iga Swiatek and Coco Gauff are far from strangers. Swiatek had won 11 of their 12 matches before Tuesday's WTA Finals match. However, it quickly became clear that today's match would be more competitive.

Coco Gauff beat defending champion Iga Swiatek 6-3 6-4 at the WTA Finals in Riyadh on Tuesday to reach the semi-finals and ensure Aryna Sabalenka would finish the year as world number one.

Coco Gauff earned her second career win over Iga Swiatek on Tuesday, winning in straight sets to reach the semifinals of the WTA Finals.

RIYADH, Saudi Arabia — Aryna Sabalenka clinched the year-end No. 1 spot in the women's rankings for the first time when Iga Swiatek lost at the WTA Finals on Tuesday.

Coco Gauff will face world No. 2 Iga Swiatek in an exciting clash at the year-end WTA Finals in Riyadh on Tuesday, as the American star looks to build on her solid form.

Aryna Sabalenka will end the year as world No. 1 for the first time, 12 months on from surrendering the honor in the final stages of the season. Iga Swiatek’s 3-6, 4-6 defeat to Coco Gauff at the WTA Tour Finals in Riyadh,

From start to finish, Aryna Sabalenka was the best tennis player this year. Sabalenka's dominant season was bookmarked with Australian Open and US Open titles, with plenty of winning in between. While she is still competing in the WTA Finals in Riyadh,

Coco Gauff posted a rare victory over Iga Swiatek to punch her ticket to the semi-finals of the WTA Finals in Riyadh on Tuesday, ensuring Aryna Sabalenka will finish the year as the world number one.

This story has been updated to reflect confirmation of Aryna Sabalenka as year-end WTA world No. 1. RIYADH — This time last year, Aryna Sabalenka was at the heart of a player re