Roger Federer vs. John Isner: Titles Won Comparison

Comparison between tennis stars John Isner and Roger Federer that includes data about all their tournaments won, who won the most total titles, Grand Slam titles, tournaments won by both players and more information put side by side.

Who won the most titles in his career, Roger Federer or John Isner? Who has more Grand Slam titles? What tournaments were won by both? These questions and some others about these champions, are answered here.