Multiple choice general knowledge sports Whose record did federer break to clinch his 15th grand slam? Pete sampras Andre agassi Rod laver John mcenroe Reveal answer Fill a bubble to check yourself A Correct answer Explanation Federer won his 15th Grand Slam at Wimbledon 2009, breaking Pete Sampras's all-time record of 14 major titles. Sampras had held this record since 2000, and Federer's victory marked a historic milestone in tennis.