Big day on the court for teen Melanie Oudin

In the first couple days of the U.S. Open we’ve seen a number of top seeds and former champions struggle.  Ranked No. 1 a year ago, Ana Ivanovic,  currently ranked No. 11, went down in defeat her first round and has since announced she’s going to temporarily take time off from the game.

It’s always fun to watch upsets and underdogs. Especially fun when the underdog doing the upsetting is a girl still in high school. That’s what happened when American teenager Melanie Oudin shocked fourth seed Elena Dementieva at the U.S. Open  in the second round.

The Russian, one of the favorites for the title after an impressive summer, was out-hit and outplayed by the 17-year-old world number 70, who handed Dementieva her joint-earliest ever exit at Flushing Meadows.

Dementieva looked to have weathered an early storm when she took the first set but Oudin, who reached the last 16 at Wimbledon, stormed back to level the match.

Oudin had the trainer on after three games of the final set to treat a thigh strain but she held her nerve to set up a meeting with either 29th seed Maria Sharapova or another American, wildcard entry Christina McHale.

Oudin is one Pretty Tough player. Next up? Sharapova.