Patrick Mouratoglou, the coach at the centre of Serena Williams’s infamous US Open final meltdown, on Thursday called for on-court coaching to be allowed at all events.

The Frenchman insists that coaching goes on all the time at tournaments and to believe otherwise is “hypocrisy”.

“Coaching is a vital component of any sporting performance. Yet banning it almost makes it look as if it had to be hidden or as if it was shameful,” Mouratoglou wrote in a Twitter statement.

“Authorising coaching in competition and actually staging it so that the viewers can enjoy it as a show would ensure that it remains pivotal in the sport.”

At the moment, on-court coaching is only allowed in WTA events but not on the men’s ATP Tour or at the four Grand Slams.

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In September, Williams was warned for coaching when Mouratoglou was spotted making signals from the players box during the US Open final against Japan’s Naomi Osaka.

Williams then carried out a running verbal battle with umpire Carlos Ramos who eventually penalised her a game.

The American described Ramos as a “liar and a thief” before crashing to defeat at a shell-shocked Flushing Meadows.

Mouratoglou insists that all players are coached from the sidelines and it is hypocrisy to deny it exists.

The US Open has experimented with on-court coaching in qualifying and junior events and it’s understood that the issue will be discussed on the sidelines of the season-ending WTA Finals in Singapore next week.

“To attract new fans, you need to get them emotionally involved. You want spectators and TV viewers to have opinions about the players – and the coaches – and to know who they like and don’t like,” added Mouratoglou.