Andy Murray speaks up on tennis sexism - add it to the list of controversial topics

Andy Murray's challenged Novak Djokovic's suggestion that men deserve more prize money than women.

The Serb said it was because "stats are showing that we have much more spectators at the men's tennis matches".

"There should be equal pay, 100 per cent, at all combined events," Murray countered.

"At the US Open, the tickets for Serena's matches were selling out much quicker than the men's," he added.

The world number two was the first top male player to speak out against Djokovic.

It's not the first time that Murray's taken a stance on a controversial issue.

Murray on doping

Many of Maria Sharapova's fellow professionals offered their support to her after she revealed she had failed a drugs test at the Australian Open.

Not Andy Murray.

Sharapova claimed she had been taking meldonium for 10 years for health reasons.

But Murray pointed out that "since 1 January (when the drug was banned) there have been 55 athletes who have failed tests for meldonium."

"I find it strange that there's a prescription drug used for heart conditions and so many athletes competing at the top level of their sport would have that condition. That sounds a bit off to me," he added.

Murray then said the Russian star, who he has played mixed doubles in exhibitions with, must "accept responsibility" for her suspension.

Murray on match fixing

Tennis chiefs were forced on the defensive during the Australian Open when a report broke which said match fixing was rife in tennis.

The investigation by the BBC and Buzzfeed claimed a former grand slam singles champion was among a group of 16 players 'who have repeatedly been reported for losing games when highly suspicious bets have been placed against them.'

Murray was - again - the most outspoken of the top players.

He said it was the first he'd heard of it and called for his sport to be more "transparent" saying: "I think we deserve to know everything that's sort of out there."

He also called for more to be done to educate young players on how to behave if they were offered incentives to cheat.

"Throughout my whole career I was never warned about that or told about that. No-one said to me how you should handle that if you're in that situation."

Murray on the blood bags

Murray called an order to destroy more than 200 blood bags "the biggest cover-up in sports history".

That was after a Spanish doctor, Eufemiano Fuentes, received a suspended one-year jail term for providing blood-doping services to cyclists.

Over 200 blood bags from 35 different people, apparently including a number of athletes from different sports, were seized as part of Operacion Puerto when Spanish police raided Fuentes' laboratory in 2006.

A Madrid judge rejected calls from anti-doping authorities to release the names of those implicated and instead ordered the blood bags to be destroyed.

Murray tweeted: "Operacion Puerto case is beyond a joke. Why would court order blood bags to be destroyed? #coverup".

Murray on the LTA

The day after helping Great Britain win their first Davis Cup for 79 years, Murray stuck the boot into Britain's tennis governing body.

He accused the Lawn Tennis Association, currently led by Canadian Michael Downey, of failing to build on his successes, and questioned where the up and coming players were.

He also revealed he had virtually washed his hands of the organisation saying: "I feel like you waste time because nothing ever gets done and I don't like wasting my time."

Murray revealed he had had barely any contact with Downey since the Canadian took up his new role, before going on to highlight Britain's slipping standards at junior level.

He said: "It's concerning not to have any juniors in the grand slams because that is something we were always very good at. It's not ideal."

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