It's a doubly huge day for the Spaniard, as says Williams has had a big impact on her own career.
Action on Centre Court begins at 2.
There could yet be a trophy in the Murray family's possession this weekend.
Andy's brother Jamie partners John Peers in the men's doubles final – they take on fourth seeds Jean-Julien Rojer and Horia Tecau.
While Martina Hingis is partnered by Sania Mirza in the ladies final against Russian pair Ekaterina Makerova and Elena Vesnina.
