Top 5 Tennis Olympics Upsets - Tennis Now Countdown Show

We are well into the 2012 Olympic Games, and we've seen several big upsets resulting in big seeded players like Agnieszka Radwanska, Tomas Berdych, Sam Stosur, and Li Na all being eliminated in the tournament. Now some of those might have been surprising, but in this countdown we are going to bring you the top 5 tennis upsets in Olympics history.