US Open organisers say umpire Mohamed Lahyani went 'beyond protocol' in his on-court pep-talk with Nick Kyrgios.
Lahyani left his chair at a changeover to talk to Kyrgios, who was trailing by a set and a break against Pierre-Hugues Herbert in Thursday's second round.
The 52-year-old was heard to tell Kyrgios: "I want to help you. This isn't you. I know that."
"Lahyani was advised to adhere to proper protocols in all matches that he officiates," added the US Open.
"Lahyani will continue to officiate during the 2018 US Open. His performance will continue to be evaluated, as will that of all chair umpires throughout the course of the US Open.