SHANGHAI, China - Rafael Nadal survived a fierce assault from Stanislas Wawrinka to reach the Shanghai Masters semi-finals Friday, staying on course for a potential title match against Novak Djokovic, who recovered from a set down to also claim victory.
World number one Nadal was pushed to the limit by Wawrinka in a highly competitive first set, but the relentless Spaniard came out on top in a gripping tie-break lasting more than 20 minutes.
It was one-way traffic in the second set as he prevailed 7-6 (12-10) 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 quarter-final 6-7 (4-7) 6-2 6-4.
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
Nadal fended off three set points for Wawrinka, against whom he now boasts an 11-0 record, before taking his fourth opportunity to win the opener.