Andy Murray’s work ethic is behind his rise to No1 and he can stay there | Kevin Mitchell

The Scot has made the necessary improvements to his game and mentality in 2016 and, with rivals faltering, he can make his stay at the pinnacle a long oneAndy Murray has worked so hard to reach the top of his sport – which he marked emphatically by beating Novak Djokovic in straight sets on Sunday – that he intends to stay there for as long as he can. There is every chance he will still be No1 in the world when he returns to defend his Wimbledon title next June and he may even be Sir