Novak Djokovic twists and turns himself into the semi-finals

World number one Novak Djokovic wins 6-3,6-2,6-4 by beating Japan's Kei Nishikori at the Australian Open.

He sets up a semi-final match against Roger Federer.

The win ensures Novak and Federer will meet for the 45th time in their careers, with a win of 22 wins each.