Livedeath
Professional
Isner compares Federer with Shawn Michaels for his showmanship, and Rafa with Ultimate Warrior for his tenacity.
Interestingly he said HBK was arrogant in his initial years, did he saw the arrogance in Fed too?
, he might not be in good books of Fed anymore. 
http://en.yibada.com/articles/114895/20160408/roger-federer-simply-the-showstopper-rafael-nadal-is-the-ultimate-warrior-–-john-isner.htm
Interestingly he said HBK was arrogant in his initial years, did he saw the arrogance in Fed too?
http://en.yibada.com/articles/114895/20160408/roger-federer-simply-the-showstopper-rafael-nadal-is-the-ultimate-warrior-–-john-isner.htm