Feeling upset this March?

AP Photo/Ed Reinke

Ball State pulled off one of the biggest upsets in women's college basketball history when it beat Tennessee in the first round of the 2009 tournament.

They call it March Madness for a reason. Ahead of Saturday's tipoff of the 2014 NCAA women's basketball tournament, we're flashing back to three of the biggest upsets, starting with the most recent, in first-round history.

1. Ball State 71 , Tennessee 55, 2009: Entering the game, fifth-seeded Tennessee was 42-0 in the first two rounds of the tournament. Not only that, but the Lady Vols also were the two-time defending national champions. Then along came Ball State, a No. 12 seed making its first trip to the Big Dance. The Cardinals got 23 points from Porchia Green, and the Lady Vols became the first defending champions to lose their opening game.

2. Marist 67, Ohio State 63, 2007: Marist, seeded 13th, was no stranger to the NCAA tournament, but prior to 2007, it had never stuck around for the second round. Representing the Metro Atlantic Athletic Conference, which was 0-21 in tournament play, Marist got 24 points from Julianne Viani and celebrated its first win in tournament history.

3. Harvard 71, Stanford 67, 1998: No team from the Ivy League had ever won a game at the NCAA women's tournament. And that was the good news. Tack on the fact that no No. 16 seed had ever knocked out a No. 1 seed -- in either the men's or women's tournament -- and the picture of what Harvard was up against becomes even clearer. And, did we mention that the game was on Stanford's home floor, where the Cardinal had a 59-game winning streak? But Allison Feaster scored 35 points and Harvard pulled off the historic upset to advance to the second round.