Answer
In 2001, Goran Ivanišević won the Wimbledon title after defeating Pat Rafter in the final. Ivanišević had previously lost in the final four times, and was considered one of the greatest players never to have won a Grand Slam title. His victory over Rafter was a major upset, as Rafter was the defending champion and had been the number one ranked player in the world for the previous two years.