Roger Federer generally doesn't loses his cool on the tennis court.
But here are some of the moments when Federer argued with the chair umpire at Australian Open.
Roger Federer was frustrated with the late call from the umpire against Tomas Berdych at Australian Open 2008
Credit: Youtube/TheSteveGTennis
Roger Federer was confused with late challenge from Andy Murray thus discussed it with the chair umpire at Australian Open 2013
Credit: Youtube/SuperMEGAXGAMES
Roger Federer was furious with the chair umpire after his challenge was unfairly taken from him at Australian Open 2018
Credit: Youtube/Australian Open TV
Roger Federer wasn't happy after losing a point after Stefanos Tsitsipas' challenge at Australian Open 2019
Credit: Youtube/Australian Open TV
Roger Federer had a long arguement with chair umpire and the line judge over audible obscenity at Australian Open 2020
Credit: Youtube/Australian Open TV