Andy Murray will be summoned by the ATP to reveal any evidence he has of match-fixing in the light of his statement yesterday. “It’s difficult to prove if someone has tanked a match or not tried,” he said. “They can try their best until the last couple of games in each set and then make mistakes, hit a couple of double faults and that’s it. It [match-fixing] is pretty disappointing, but everyone knows it goes on.”

The British No 1 was adding his voice to the debate about potential corruption that has cast such a pall over the sport.

The first tennis Integrity Unit is in the process of being set up by the four stakeholders in the sport, including the grand-slam tournaments, which are greatly troubled by recent stories about approaches being made to players in locker-rooms at their venues.

At a recent ATP Player Council meeting, the idea of separate locker-rooms being built in tennis stadiums for players only was raised — with no coaches, family members or hangers-on being allowed entry, leading to a vastly reduced risk of sensitive information leaking out.

Players will be given 48 hours to tell the authorities if they are approached about match-fixing and risk punishment if they fail to do so. The 48-hour rule will be adopted by the board of the ATP when it meets in November.

Murray, who plays Evgeny Korolev, of Russia, in the first round of the Kremlin Cup tournament in Moscow today, got to the heart of the matter when he said: “There are some guys who come to tournaments every week and out of their first-round loser’s cheque they have to pay their air fares. A career lasts probably ten or 12 years and you have to make all your money while you’re still playing. But it’s not really acceptable.”