Well, American chair umpire Gregory Allensworth was recently accused of making this mistake in Cincinnati not once but twice.

Officials were forced to act quickly during Novak Djokovic's Miami Open semi-final match against Grigor Dimitrov as a "heckler" was removed from the stands after just three games. Dimitrov became ...

Before arguing with the chair umpire at Indian Wells, Opelka beefed with umpire Greg Allensworth at the Dallas Open. Opelka described Allensworth as "bush league" and "amateur hour" and called ...

And the umpire jumped into swift action. Greg Allensworth got down from his chair and raced over. He then got on his radio for Gerry Armstrong to request security intervened. He said: "Gerry ...

"I can't just be a punching bag": Reilly Opelka sounds off on Greg Allensworth, lack of accountability ...