“I really don't want to talk about my knee”
"Now I have another chance to try and go farther. Being in the quarter-finals is fantastic. I'm more than pleased with what I've done since I returned."
Nadal missed over seven months with a knee injury before returning in February, since when he has won five titles and reached seven finals.
"I really don't want to talk about my knee," he added. "I'm fine. I fought a lot to be where I am today.
"These matches like today, where you're in trouble all the time but you keep fighting for every ball, this victory means a lot. To have another one like this is very special."