Four-time Grand Slam winner Jamie Murray has dismissed claims by Serena Williams that sexism is rife in tennis, labelling the claims as 'a bit far-fetched'.

Murray, who won the US Open with mixed doubles partner Bethanie Mattek-Sands on Saturday, was also quick to defend under-fire umpire Carlos Ramos, claiming that he merely did 'what was within his rights'.

Williams' claims about sexism came after her shock US Open final defeat to Naomi Osaka in straight sets, in which she was docked a game after brandishing umpire Ramos 'a liar' and 'a thief'.

Williams had also previously been reprimanded in the match for intentionally damaging her racket, as well as being seen to receive coaching from her trainer, a claim which she fiercely denied. 

Despite many current and former umpires and pundits coming to Ramos' aid in the ongoing argument, Williams was unrelenting in her criticism of both the umpire and the decision, and claimed after the match that the same punishment would not have been applied were she a male. 

This claim has sparked much debate and deliberation across the entire sport, especially after the legendary American player received the full backing of the Women's Tennis Association - the governing body of women's tennis. 

However, despite this backing - and the general furore surrounding the issue - Murray was less than impressed with the claims being made by his fellow professional. 

"I think the umpire did what was within his rights," Murray told the BBC.

"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 reactions 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 no with it."

Whilst Murray's comments are sure to spark outrage amongst those who support Williams in the matter, others have protested over the lack of coverage that eventual winner Osaka received due to the incident. 

Further fuel has also been added to the fire by US Tennis Association chief Katrina Adams, who was reportedly overheard apologising to Ramos over the incident, and the scrutiny and abuse he has suffered since as a result.