Apr 23 (Kyodo) - Nadal, an 11-time champion at the tournament in his home nation of Spain, reached his 14th career quarterfinal at the ATP 500-level tournament to extend his career head-to-head lead over the Japanese world No. 39 to 12-2.
"I wasn't able to win all the key points," Nishikori said after the 2-hour, 19-minute match.
"I don't understand why I can't play well consistently and it's frustrating. I have to put together at least two sets of top-level tennis in a match," he said.