WATCHING WORLD NUMBER four Andy Murray playing live on TV is such a nerve-racking experience for the star’s mum that she forces herself to “hit the record button and try to switch off”.

Writing for the Daily Mirror, Judy Murray, who is rather hyperbolically described as “the most famous mum in tennis”, also wrote of her role in her son’s life as a coach, explaining that “the part of the sport I enjoy the most is tactically analysing opponents and working out bits of strategy”.

However, she dismissed suspicions of being the stereotypical, overly-domineering tennis mum.

“Between the Australian Open in January and the Italian Open last month I did not attend a tournament. And, while I am always  available to chat to about tennis, I do not give him some sort of  running commentary on his game.”

The mum also described Murray’s dismay, after a visit from a drug-tester wrecked his plans for an early morning lie-in – the fourth time in 27 days that he had been tested.