Look at Sampras killing Agassi in the 99 World Championship final. Sampras missed the U.S Open with a back injury, which most likely he would have won and ended the year #1 again as Wimbledon and U.S Open Champion to only Agassi's French Open. However this injury allowed Agassi to end the year as French and U.S Open Champion and end the year #1. Poor Peter was probably sad and dissapointed to lose something that was not his fault. However he took out his frusteration and anger on poor Andre, dont get Peter mad or he came after you whether it was your fault or not, he did not car, he used anything to find motivation to crush you and show all his talent.