Federer, Djokovic to vie in Cincy finale

CINCINNATI, Aug. 18 (UPI) -- Top-seeded Roger Federer will face off against No. 2 Novak Djokovic for the title of the Western & Southern Open after both won semifinal matches Saturday.

Federer, who grabbed the world No. 1 ranking away from Djokovic following his Wimbledon victory last month, gained the Cincinnati final with a 7-6 (7-4), 6-3 win against fellow Swiss Stanislas Wawrinka.

Federer will be shooting for his fifth career title at the Ohio event.

Djokovic, meanwhile, bested Argentina's Juan Martin del Potro 6-3, 6-2 in the day's other semifinal matchup.

The Serbian superstar avenged his loss to del Potro in the bronze medal match at the London Olympics.

Djokovic has won six of his last meetings with Federer. Their last meeting was at Wimbledon, where Federer notched a four-set semifinal victory en route to his seventh All England Club title.