Djokovic to face Federer in Cincinnati final

Djokovic hits return to del Potro

(Reuters) - Roger Federer and Novak Djokovic, the top two players in the world, set up a showdown for the Cincinnati Masters title after cruising to semi-final victories on Saturday.

The gap between the leading four, which also contains Rafa Nadal and Andy Murray, and the chasing pack was again evident as Djokovic beat Argentine Juan Martin del Potro 6-3 6-2 before Federer saw off fellow Swiss Stanislas Wawrinka 7-6 6-3.

World number one Federer is chasing a fifth title in Cincinnati while Djokovic is hoping to claim his first at the Ohio venue.

The Serb has lost in the final three times including last year when he retired injured in the second set against Murray and in 2009 when he was beaten by Federer.