Rafael Nadal survived a fierce assault from Stanislas Wawrinka to reach the Shanghai Masters semifinals Friday, staying on course for a potential title match against Novak Djokovic. The world No. 1 won 7-6(10), 6-1.

Top seed Djokovic kept his side of the bargain under floodlights at the Qizhong Tennis Center, withstanding a feisty challenge from Frenchman Gael Monfils to win his quarterfinal 6-7(4), 6-2, 6-4.

Easy wins

Elsewhere in last-eight action, Jo-Wilfried Tsonga and Juan Martin del Potro breezed through their matches in straight sets as they hunt berths at next month's elite World Tour Finals.

The results: Quarterfinals: Rafael Nadal bt Stanislas Wawrinka 7-6(10), 6-1; Novak Djokovic bt Gael Monfils 6-7(4), 6-2, 6-4; Juan Martin del Potro bt Nicolas Almagro 6-3, 6-3; Jo-Wilfried Tsonga bt Florian Mayer 6-2, 6-3.— Agencies

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