I am not sure about this one, but when tennis matches are interrupted, betting remains open a long time. There was one time for sure where it seemed like there was a lot of over betting on the favorite and the odds were way out of whack. So many people just bet the favorite blindly in tennis. You would have to be pretty sure of yourself others didn't know what you don't. I'm talking vague, but I only bet on ESPN right now and they may have stopped betting after some time.