Andy Murray’s brother Jamie has spoken out on Serena Williams’ US Open final antics, claiming the 24-time Grand Slam champion’s reaction was ‘pretty overboard’, ESPN report.

Williams was caught up in a heated argument with umpire Carlos Ramos during her straight sets loss to Japan’s Naomi Osaka and labelled Ramos as a “liar” and “thief” after being penalised for coaching.

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The American also accused the umpire of sexism, claiming any male plyer wouldn’t have been given the same punishment and received a $17,000 for her outburst against Ramos.

Murray, who is currently part of Great Britain’s Davis Cup squad taking on Uzbekistan, enjoyed personal success at Flushing Meadows, winning the US Open mixed doubles competition with partner Bethanie Mattek-Sands.

When asked recently about Williams’ sexism claims, Scot Murray said:

I think the umpire did what was within his rights. Coaching is common, a lot of people are doing it, some people aren’t getting called for it.

To get called in a Grand Slam final was perhaps a bit tight, but I think the reaction was pretty overboard.

I’ve seen a lot of people get called for coaching before, and you might have a grumble and stuff but you get on with it.

Murray and his Great Britain squad are currently level 1-1 with Uzbekistan after Dan Evans and Cameron Norrie’s single matches on Friday.