The Australian Tennis Open has a dream men's semi-final line-up, but reigning champion Novak Djokovic will carry some physical queries into the tournament's final stages.
The world number one's 6-4 7-6 6-1 quarter-final victory over Spanish fifth seed David Ferrer ensured the Big Four became the last four at Melbourne Park for the first time.
The Serbian star will face Andy Murray in tomorrow nights semi-final after the Scot earlier blitzed Japan's Kei Nishikori in straight sets.
Djokovic was left clutching at his left hamstring at one point against Ferrer and appearing to struggle with his breathing for long stages, however the top seed isn't concerned.
Second seed Rafael Nadal and third seed Roger Federer are set to renew their long-time rivalry in the first semi-final tonight.
