'Baby Fed' fed up with effort

Rising star Grigor Dimitrov admits he still has work to do if he wants to break the Grand Slam dominance of the old guard after Andy Murray shattered his Australian Open dream.

The Bulgarian has been tipped as a future major champion but must now wait until the French Open to have another crack at proving his credentials alongside the likes of Novak Djokovic, Roger Federer and Rafael Nadal.

Dubbed 'Baby Fed' for his playing similarities to Federer and a picture-perfect one-handed backhand, Dimitrov was ground down by Britain's Murray in a titanic four-setter on Sunday evening.