London, July 3: Germany's Sabine Lisicki backed up her stunning win over Serena Williams by beating Kaia Kanepi to reach the semi-finals at Wimbledon.

The 23-year-old, seeded 23, won 6-3 6-3 on Court One to secure a place in the last four at the All England Club for the second time.

There she will face Polish fourth seed Agnieszka Radwanska, last year's runner-up, who beat Chinese sixth seed Li Na, 7-6 (7-5) 4-6 6-2 on Centre Court.

"It's hard to be angry about something when you're smiling and that's why the crowd really like her. Lisicki came here as favourite and she's looking the player to beat."

In the other half of the draw, France's 15th seed Marion Bartoli beat Sloane Stephens 6-4 6-4, and Belgian 20th seed Kirsten Flipkens upset 2011 champion Petra Kvitova 6-4 3-6 6-4.

Kvitova's defeat means there will be a new name on the women's trophy on Saturday.

Lisicki had caused arguably the shock of a tournament characterised by upsets when she beat defending champion Williams on Monday, and she suffered no comedown 24 hours later.

It was the German's returning, rather than her big serve, that proved the difference in the first set as she broke in a lengthy opening game and again to take the set.

Kanepi, who beat Laura Robson in round four, edged ahead in the second when Lisicki double-faulted twice.

The German responded immediately though, reeling off four straight games and closing out the match, rather nervily, on her third match point.