Sunday 6 November 2016 11:34, UK
John Isner was left furious after being called for a foot fault and continued the argument during the break of play at the Paris Masters.
The American was up against his doubles partner Jack Sock in the last eight in Paris and while their was no animosity between the two, emotions did run high for Isner.
The 31-year-old could barely contain his anger after being called for a foot fault in a controversial call that also left the commentary box undecided as to whether he had been harshly treated or not.
Once the point had been and gone, Isner was not able to keep his cool, continuing the argument during the break in play - hit playon the video at the top of the page to see Isner's fury.
The big serving American did have the last laugh though as he powered into a seventh Masters semi-final with a 7-6 4-6 6-4 victory.
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