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It was all change at the top of tennis this week, as Daniil Medvedev became the new world No 1 for the first time. It marked an end to Roger Federer, Rafael Nadal, Novak Djokovic and Andy Murray's 18-year stronghold at the top spot, with many seeing it as a changing of the guard. But one former pro isn't ready to write off the ageing multiple-time Grand Slam champions just yet.

Medvedev became the 27th man to be crowned the ATP world No 1 when the rankings were updated on Monday.

He clinched the top spot after a successful last 12 months which saw him win his maiden Grand Slam title at the US Open.

As Djokovic suffered a shock defeat to qualifier Jiri Vesely at the Dubai Duty Free Tennis Championships last week, the 26-year-old's new spot at the top of tennis was confirmed.

Medvedev has been the standout in a group of top young