The official website of Novak Djokovic

A sore shoulder forced world no.1 Novak Djokovic to retire in the second set on Sunday, giving fourth-seeded Andy Murray a 6-4, 3-0 win in the finals of the Western & Southern Open, an ATP World Tour Masters 1000 event.

The top-seeded Serbian star secured his berth in the final of the 2011 Western & Southern Open, an ATP World Tour Masters 1000 event.

World no.1 is through to the Western & Southern Open semi-finals with a 3-6, 6-4, 6-3 victory over no.6 seed Frenchman Gael Monfils..

The top-seed dismissed world no.29 Czech Radek Stepanek in straight sets on Thursday to reach the Western & Southern Open quarter-finals.

The world’s no.1-ranked player beat American teenager world no.78 Ryan Harrison 6-2, 6-3 to improve to 54-1 this year, a run that has included nine titles.

The draw for the Western & Southern Open, an ATP World Tour Masters 1000 event in Cincinnati (hard, $2,430,000) is out. The tournament starts on Sunday, August 14.