David Letterman is the host of a long-standing and popular talk show and thus has had some of the top tennis players like Roger Federer, Serena Williams, etc.
Novak Djokovic appeared on the Late Show with David Letterman in 2014.
Credit: Youtube/ Marvel Richter
After winning the US Open 2014, Marin Cilic came on the Late Show with David Letterman
Serena Williams joked about playing Andy Murray at Late Show with David Letterman
Credit: YouTube/José Manuel Carioca
Maria Sharapova was ultra cool in her appearance in Late Show with David Letterman.
Credit: YouTube/reginald kirby
Rafael Nadal spoke about his rivalry back in 2011.
Andre Agassi appeared on Late Show with David Letterman twice, his last appearance came in 2009.
Roger Federer candidly spoke about retirement back in 2005.