Tennis is a psychological battle between two players. Unforced error only means that a player hit a ball out or into the net that they should have made. But the other player has everything to do with it. BTW, tennis has 4 Super Bowls a year; the Australian Open, French Open (Roland Garros), Wimbledon, and the US Open. This is the farthest Jess has made it in any of them, and she got there by beating the #1 player in the world. Good Stuff.