MADRID: World No 1 Rafael Nadal said on Monday all he needed was some rest to recover from the knee problem that hampered his performance in the World Indoor Tournament final in Rotterdam.

Nadal lost 6-3 4-6 6-0 to Andy Murray on Sunday with his right knee causing him greater discomfort than the Briton's ankle complaint.

"It isn't the knee, it's lower down. It's a strain on a tendon that above all else stops me from serving well, but we are almost certain there won't be any problems," Nadal told reporters in Madrid.