Ana Ivanovic photo
Serbian tennis cutie pie, Ana Ivanovic, is scheduled to face off with Serena Williams, Jelena Jankovic, and Venus Williams in a one-night-only single-elimination showdown at Madison Square Garden Monday, March 2, 2009. The event will be telecast live on HBO beginning at 7:30 p.m.

These four player each held the No. 1 ranking at least once, and will compete in a one-set semifinal. The winners will move on to a best-of-three-set final.

Jankovic is currently ranked No. 1, Serena Williams No. 2, Ivanovic No. 5, and Venus Williams No. 6. Ironically Jankovic is the only one of the four to have never won a Grand Slam, and she is currently No. 1.

Tickets went on sale as of Tuesday, and are priced from $50 to $1,000. The showdown is a benefit for the Dream Vaccines Foundation and Women’s Sports Foundation. So buy your tickets and see four of the world’s best tennis players in person and support some worthy causes!