Novak Djokovic has progressed to the semi-finals of the Shanghai Masters after overcoming Tommy Haas in straight sets this afternoon.

The world number two broke Haas in the sixth game of the first set having previously squandered two break points, ultimately taking it 6-3.

Haas made a good start to the second set, racing into a 2-0 lead before Djokovic fought back, winning five games in a row.

Haas broke back in the penultimate game of the set, but Djokovic won on Haas's serve for the fourth time in the encounter to take the match 6-3 6-3.