Rafael Nadal on Tuesday revealed he’s still in pain despite his titanic form since returning from injury -- and played down suggestions a hi-tech treatment was behind his amazing comeback. Nadal has had a sensational year, winning 10 titles including two Grand Slams after seven months out with a left knee injury, and displacing Novak Djokovic as world number one in the latest rankings. He at the Shanghai Masters that while a combination of machines and PRP had ‘worked unbelievable’ on his knee in the past, there was no magic cure this time around. ‘With the injury I have now, I did (try PRP),’ he said. ‘I tried a lot of times, and it really didn’t help me a lot. ‘The machines I have at home, the only thing that helps me is to make me a little bit more fit without having to run or something like this, or putting pressure on the tendon. I need to keep working hard.’