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 ...

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