The Tantrum. Serena already has received a warning for slamming her racket during the match, and then she is called for a foot fault during a second serve at 4-6, 5-6, 15-30 in a semifinal against Kim Clijsters. This makes the score 15-40 and Serena threatens to shove a tennis ball down the throat of the lineswoman who made the call. While officials hold a conference, Serena can be heard saying, "I didn't say I would kill you! Are you serious?" She is assessed a second violation that costs her a point and the match, 4-6, 5-7.