Pierre-Hugues Herbert, the French tennis player, said he thought the umpire's mid-match intervention was unnecessary and that his opponent's mood changed after the talk. Kyrgios, who appeared to be struggling during the second round match at the US Open, went on to win in four sets after umpire Mohamed Lahyani stepped down from his chair to have words with him.
Nick Kyrgios gets pep talk from umpire to set up Federer clash
