"He has the potential to be number one, and win important titles, which he's already done," said Nadal. "If he's better than me at the end of the season then I'll congratulate him. If I'm number three then I'll be happy there because I'll have tried my best. "Sure he Murray can improve more on clay, and if he improves and plays a very good level it's going to be very difficult to stop him because on the rest of the surfaces he is very good," added 22-year-old Nadal. http://news.bbc.co.uk/sport1/hi/tennis/8049455.stm To save anyone posting this, I'm sure Rafa doesn't really believ this and is hiding his real feelings on the subject.