2015 WTA Finals – Singles

Agnieszka Radwańska defeated Petra Kvitová in the final, 6–2, 4–6, 6–3 to win the singles tennis title at the 2015 WTA Finals. This marked the first time since 2005 that the Tour Finals champion did not win a major in the corresponding year.

Serena Williams was the three-time reigning champion, but withdrew due to injury.

Garbiñe Muguruza, Flavia Pennetta and Lucie Šafářová made their debuts at the event.

For the first time since the round-robin format was re-introduced in 2003, both finalists reached the final despite losing two matches in the round-robin stage.

This year marked the first time since 2006 that all participating players came from European countries.

Seeds
• # 🇷🇴 Simona Halep (round robin)

• # 🇪🇸 Garbiñe Muguruza (semifinals)

• # 🇷🇺 Maria Sharapova (semifinals)

• # 🇨🇿 Petra Kvitová (final)

• # 🇵🇱 Agnieszka Radwańska (champion)

• # 🇩🇪 Angelique Kerber (round robin)

• # 🇮🇹 Flavia Pennetta (round robin)

• # 🇨🇿 Lucie Šafářová (round robin) Notes:
 * 🇺🇸 Serena Williams had qualified but withdrew from the tournament

Alternates
• # 🇺🇸 Venus Williams (Not used)

• # 🇪🇸 Carla Suárez Navarro (Not used)