Kei Nishikori, Milos Raonic, Bernard Tomic and Grigor Dimitrov are all relatively young and have enough about themselves to be there or there about in a few years
anyways as for Murray its a great achievement should go on to win a minimum of 5 grand slams no. I think by the next Wimbledon he'll have his 3rd and possibly 4th. His consistency at the big tournaments over the last 12 months has been incredible and that's testament to Lendl who's given him belief he can win and isn't afraid to tell him exactly what he thinks whether that be about his game or his attitude, it has all come together in a big way now.