Medical scans have revealed no serious problems as Rafael Nadal continues his recover from a back injury sustained at the Australian Open tennis tournament. The injury contributed to Nadal's loss to Stanislas Wawrinka in the final at Melbourne. Nadal is continuing to work out in the gymn and his return to the court-- starting Thursday-- will decide when he is ready to return to competition. He is scheduled to play in Buenos Aires next week. Doctors had prescribed anti inflammatory medication and physical therapy to speed his recovery.