Williams sisters on course for final

Wimbledon looks set for another all-Williams women's final after both Venus and Serena made it to the last four with easy victories over Agnieska Radwanska and Victoria Azarenka in their respective quarter finals.

Despite playing with a heavily strapped knee, 29-year-old Venus, who has won five previous Wimbledon titles, and hasn't even lost a set at the tournament since the third round in 2007, thrashed Radwanska, the 11th seed from Poland, 6-1 6-2.

Venus clambered all over her young opponent's serve, and Radwanska admitted she'd been outclassed. "Her game is so powerful, it was very hard to do anything on the court,” she said. "It's so hard to break her when she's serving at 120mph. Venus and Serena are so different to other opponents."

The elder Williams sister will play Russian Dinara Safina in Thursday's semi-final. Safina, who is the world number one, but is yet to win a Grand Slam, won 6–7, 6–4, 6–1 in three tough sets against Sabine Lisicki, the unseeded German whose breakthrough has been one of the surprises of this year's tournament. Safina, who has historically struggled on grass, was under no illusions that she was going to have to improve. "My service today, I think I was Santa Claus serving so many double faults," she said. "On the practice court I don't serve a single double fault. The serve is there, I just have to put the brain there. I know what I have to do, I'm just not doing it."

The other match will be between Serena, who dispatched Azarenka, the Belarusian eighth seed 6-2, 6-2 with a powerful and error free display, and another Russian, Elena Dementieva. Dementieva, who also reached the Wimbledon semis last year, has quietly progressed through the draw. She beat Francesca Schiavone 6-2, 6-2. ·