2012 WTA Tour Championships – Singles

Serena Williams defeated Maria Sharapova in the final, 6–4, 6–3 to win the singles tennis title at the 2012 WTA Tour Championships. It was her third singles title at the event. Williams did not lose a set during the tournament.

This is the most recent edition of the event where the final was a rematch of a previous edition's final; Williams and Sharapova also contested the 2004 final, which Sharapova won. The 2012 edition was the first such event since the 1998 and 1999 editions, when Martina Hingis and Lindsay Davenport contested multiple finals of the WTA Tour Championships.

Petra Kvitová was the defending champion, but withdrew after her first match due to nasopharyngitis.

Angelique Kerber and Sara Errani made their debuts at the event.

Players
• # 🇧🇾 Victoria Azarenka (semifinals)

• # 🇷🇺 Maria Sharapova (final)

• # 🇺🇸 Serena Williams (champion)

• # 🇵🇱 Agnieszka Radwańska (semifinals)

• # 🇩🇪 Angelique Kerber (round robin)

• # 🇨🇿 Petra Kvitová (round robin, withdrew because of nasopharyngitis)

• # 🇮🇹 Sara Errani (round robin)

• # 🇨🇳 Li Na (round robin)

Alternates
• # 🇦🇺 Samantha Stosur (round robin, Replaced Kvitová)

• # 🇫🇷 Marion Bartoli (Not Used)

Red group
''Standings are determined by: 1. number of wins; 2. number of matches; 3. in two-players-ties, head-to-head records; 4. in three-players-ties, percentage of sets won, or of games won; 5. steering-committee decision.''

White group
''Standings are determined by: 1. number of wins; 2. number of matches; 3. in two-players-ties, head-to-head records; 4. in three-players-ties, percentage of sets won, or of games won; 5. steering-committee decision.''