#2. French Open 2007 vs Maria Sharapova

Ana Ivanovic is one of the few players to have beaten both Sharapova and Serena Williams(this victory isn't in the list as she was carrying a niggle but it's still a great win). She was playing her first Grand Slam semifinal in the 2007 Roland Garros and was facing 2nd seeded Maria Sharapova.
Ivanovic got off the blocks like a racehorse, holding the first game and breaking serve immediately. She got a break again when Sharapova double-faulted to go 5-1 up before the Russian broke back. At 5-2 she got yet another break to take the set.
In the second set, the 7th seed didn't face an iota of pressure. Although she was 0-30 down after being 2-0 up, she served well to take the game. There was no stopping her as she hurtled towards the finish winning the match 6-2 6-1. With that Ana Ivanovic reached her first ever Grand Slam final.