I just love to see tennis players get upset and freak out.
Serena Williams usually contains herself quite well, it's normally her older sister that whines more often.
Here's Serena losing in the semi finals of the US Open (2009). She gets called on a foot-fault and proceeds to tell the line judge that she's going to shove this fucking ball right down her fucking throat.
Kim Clijsters won the match and advanced to the finals.