Venus Williams has a 5-2 winning record against her semi-final opponent Elena Dementieva.
Wimbledon semi-final: Venus Williams v Elena Dementieva
Thursday's semi-final will be the eighth meeting of Venus Williams and Elena Dementieva and the first on grass.
Williams has a 5-2 winning record against the Russian, winning the last two meetings, the most recent of which was in Warsaw last year.
Dementieva won the first meeting between the pair in a Fed Cup match in 1999 but has only one win to her credit since then, a three-set victory in Miami in 2004.
Williams is the defending champion and is a four-time winner on the grass of the All England Club, where she has also been a runner-up twice.
She has never won either the Australian Open or the French Open, but her two victories at the US Open take her Grand Slam tally to six titles.
In all, the seventh seed has won 36 WTA Tour titles in a professional career spanning almost 14 years.
Dementieva, the fifth seed, is the highest ranked player left in the tournament after reaching the semi-finals for the first time.
Her previous best performance at Wimbledon saw her reach the last eight in 2006 before losing in straight sets to Maria Sharapova.
She has reached two Grand Slam finals - the French and US Opens in 2004 - but lost both in straight sets, going down to Anastasia Myskina in Paris and Svetlana Kuznetsova in New York.
The 26-year-old has won nine WTA Tour singles titles and has a career-high ranking of four in October 2004.
Head-to-head record:
1999 Fed Cup (Hard)
Winner: DEMENTIEVA 1-6 6-3 7-6
2000 Olympics (Hard)
Winner: WILLIAMS 6-2 6-4
2001 Indian Wells (Hard)
Winner: WILLIAMS 6-0 6-3
2002 Miami (Hard)
Winner: WILLIAMS 5-7 6-3 6-2
2004 Miami (Hard)
Winner: DEMENTIEVA 6-3 5-7 7-6
2005 Fed Cup (Clay)
Winner: WILLIAMS 6-1 6-2
2007 Warsaw (Clay)
Winner: WILLIAMS 6-1 7-6
