In 1998, Rafter came back from a set down to defeat Sampras in the Cincinnati Masters final, a title that Sampras needed to win in order get the maximum ranking points to stay No. 1 ahead of Marcelo Ríos. During that match, Rafter's serve was called out, but the umpire overruled the call to give Rafter the ace and the Cincinnati title. Sampras was displeased, and stood at the baseline for several seconds, making the victorious Rafter wait at the net, and then refused to shake the umpire's hand. Sampras, at the time winner of 11 Grand Slams, when asked about the difference between himself and Rafter, said "Ten grand slams", that a controversial line-call cost him the match, and that a player had to come back and win another Grand Slam title in order to be considered great. Rafter went on to win the Canada Masters as well, earning the third seed at the 1998 US Open.