The eight-time Major winner believes the world number one gets sucked into unnecessary battles and says he could suffer unless he plays with more aggression as age inevitably catches up with him.

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“Andy has skills that are rarely outmatched,” he told the Guardian.

“I was never the best athlete and had to think strategically. But he has so much athleticism he has a tendency to rely on that and make matches harder than they need to be.

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“If you brought down his speed, matches might get easier because he’d have more conviction to go after [opponents].

“He’s getting more assertive and that will help because long-term wear and tear is a factor.

“But Andy would be terribly disappointed if he didn’t win another slam or two. There’s no question he can win more.”

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Murray has suffered a topsy-turvy start to 2017, with early defeats at the Australian Open and Indian Wells sandwiched between a title in Dubai.

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