FILE - In this June 26, 2012 file photo, Rafael Nadal of Spain returns a shot to Thomaz Bellucci of Brazil during a first round men's singles match at the All England Lawn Tennis Champi

 

              FILE - In this June 26, 2012 file photo, Rafael Nadal of Spain returns a shot to Thomaz Bellucci of Brazil during a first round men
FILE - In this June 26, 2012 file photo, Rafael Nadal of Spain returns a shot to Thomaz Bellucci of Brazil during a first round men's singles match at the All England Lawn Tennis Championships at Wimbledon, England. One week ahead of his expected return to tennis, Rafael Nadal says his left knee is still causing him pain. The 26-year-old Spaniard is scheduled to play next week in Chile before heading to tournaments in Brazil and Mexico. Speaking Wednesday, Jan. 30, 2013, on the island of Mallorca, Nadal says that although his knee is looking better, "sometimes it still hurts ... but I have to start sooner or later." (AP Photo/Anja Niedringhaus, File)