(Paris, FRA) - Defending champion Li Na of China crashed out of the French Open on Monday, losing a fourth round tie 3-6, 6-2, 6-0 to unseeded Yaroslava Shvedova of Kazakhstan.

Shvedova, the world number 142, will play either Varvara Lepchenko of the United States or fourth seed Petra Kvitova of the Czech Republic for a place in the semi-finals.

Li, the 30-year-old world number seven, was attempting to be the first French Open women's champion to successfully defend the title since Justine Henin in 2007.

After a confident start, Li had a spectacular meltdown in the second set and never recovered, notching 41 errors and ending up broken seven times by her 26-year-old opponent.

Shvedova had also made it to the Roland Garros quarter-finals in 2010, her first time in a Grand Slam last eight, and was the sole qualifier remaining in the women's draw when she beat Li.