2007 WTA Tour Championships – Singles

Defending champion Justine Henin defeated Maria Sharapova in the final, 5–7, 7–5, 6–3 to win the singles tennis title at the 2007 WTA Tour Championships. The final lasted 3 hours and 23 minutes, becoming the longest best-of-three-sets final in WTA Tour history.

Jelena Janković, Ana Ivanovic, Anna Chakvetadze and Marion Bartoli (as an alternate replacing Serena Williams) made their debuts at the event.

Seeds
• # 🇧🇪 Justine Henin (champion)

• # 🇷🇺 Svetlana Kuznetsova (round robin)

• # 🇷🇸 Jelena Janković (round robin)

• # 🇷🇸 Ana Ivanovic (semifinals)

• # 🇺🇸 Serena Williams (round robin, withdrew due to left patella femoral inflammation)

• # 🇷🇺 Maria Sharapova (final)

• # 🇷🇺 Anna Chakvetadze (semifinals)

• # 🇸🇰 Daniela Hantuchová (round robin) Notes:
 * 🇺🇸 Venus Williams had qualified but pulled out due to severe dizziness

Alternates
• # 🇫🇷 Marion Bartoli (replaced S.Williams) (round robin)

• # 🇷🇺 Elena Dementieva (not used)

Yellow 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.''

1 Serena Williams withdrew from the tournament after her first match (left patella femoral inflammation).

2 Bartoli's 6–0, 6–0 loss was the heaviest defeat in the tournament's history, and the only double bagel.

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.''