India's Sania Mirza [Images] crashed out of the women's singles event at the Olympics [Images] after retiring midway through her opening round match against Czech Iveta Benesova in Beijing [Images] on Monday.

- Day 3 Images: India at the Olympics

Sania trailed 1-6, 1-2 against Benesova before making a tearful exit after her a right wrist injury forced her to concede the match.

Sania had been struggling with a chronic soreness in her wrist wrist for almost two years and had undergone a surgery in the US earlier this year.

The 21-year-old, however, remains in contention in doubles where she has teamed up with US-based Indian Sunitha Rao.