Serena and Venus Williams will face each other in the finals of Wimbledon for the fourth time. The sisters won the semi-finals in contrasting styles. 

Serena reached her fifth final with a 6-7 (4/7), 7-5, 8-6 win over Elena Dementieva of Russia in the longest semifinal in the tournament's history. 

The match lasted 2 hours 49 minutes. 

But top seed and World No 1 Dinara Safina of Russia latter suffered a crushing defeat at the hands of Venus Williams as the American sailed to an easy 6-1, 6-0 win in just 51 minutes. 

This was the most one-sided women's semifinal in 40 years. Venus, who defeated Serena in the 2008 finals, will be playing in her eighth final at Wimbledon. 

Two-time champion Serena praised Dementieva who lost in the semi-finals for the second year in succession. 

Dementieva was on a match point on one occasion. But she could not convert it. Olympic champion Dementieva, who had won three of the pair's last four encounters, defied prophecy of a one-sided match by breaking Serena in the first game although the American hit back straight.