Williams sisters, Zheng, Dementieva in Wimbledon semis

The Williams sisters are in opposite halves of the draw and could meet in Saturday8217;s final. The two have been twice before in the Wimbledon final, with Serena winning both in 2002 and 8217;03

8220;That would be amazing if we both were in the final,8221; seventh-seeded Venus said. 8220;I have to take it one more step and keep playing power tennis.8221;

Venus will next face No 5 Elena Dementieva, who wasted a 5-1 lead and two match points in the second set before beating fellow Russian Nadia Petrova 6-1, 6-7 6, 6-3 to reach her first Wimbledon semifinal.

Sixth-seeded Serena will play Zheng Jie, who became the first Chinese player to reach the semifinals of a Grand Slam by beating Nicole Vaidisova 6-2, 5-7, 6-1. The 133rd-ranked Zheng is also the first wild-card entrant to reach the women8217;s semis at Wimbledon and second at any Grand Slam.

8220;I think many people will watch this match in China,8221; Zheng said.

The Williams sisters will be heavy favourites to set up their sixth Grand Slam final showdown. Serena leads 5-1 in Slam finals and 8-7 in overall matches.