With Wimbledon kicking off next Monday, tennis's power set stepped out last night for a little off-court fun at a pre-Wimbledon party in London. The fete brought out the likes of world champion Maria Sharapova and the Grand Slam masters Venus and Serena Williams. And while we're used to seeing these ladies in sportier attire, they certainly pulled out all the stops on their cocktail party ensembles. Venus chose a summery Amanda Wakeley LWD that draped in all the right places, Danish stunner Caroline Wozniacki showed off her form in a cool Stella McCartney LBD, Maria opted for a supergirlie high-low profile in embellished Antonio Berardi and ruby-red Roger Vivier heels, Serena went for short and sweet in a purple taffeta Burberry number, and Serbian beauty Ana Ivanovic looked ultrafeminine in a feather-accented Matthew Williamson dress. No matter how fierce these women can get on the court, they're just as skilled in the after-hours style department. Now it's match point — you decide who deserves the Most Fab title below.