Sabalenka wins WTA Finals opener despite wayward serve

Aryna Sabalenka began her WTA Finals campaign with a close win over Karolina Muchova, despite struggling with her serve and showing visible frustration. The world number two recovered from a break down in both sets to win 7-6 (7-2) 7-5, putting her in contention for her first title at the season-ending event.

Sabalenka hit seven double faults and four aces, landing 59% of her first serves and winning 33 of 44 points behind them. She is playing the Finals for the sixth time and is seen as a leading contender after world number one Elena Rybakina withdrew; Mirra Andreeva also opened with a 6-4 6-0 win over Elina Svitolina.