Let's start with Julia Shruff. The German veteran, ranked number 137 in the world and competing as a qualifier, defeated the up-and-coming Petra Kvitova, 6-3, 2-6, 6-4.
Kaia Kenepi defeated her Dubai doubles partner, Tamira Paszek, 2-6, 6-2, 6-0. (Kanepi and Paszek were eliminated in the first round of doubles.)
Another up-and-coming player, Anastasia Pavyluchenkova, upset Maria Kirilenko, 6-2, 6-4.
Elena Vesnina, who, for some reason (if anyone knows the reason, please tell me) has significantly elevated her game this season, defeated Li Na, 1-6, 6-4, 6-4. Granted, Li is just returning to the tour, but this is still an impressive win from Vesnina.