Billie Jean King believes she could fix Rafael Nadal's confidence issues.
"He's playing better than he was [before]," King said Wednesday. "I just don't know if he knows it."
King, the tennis icon who won 67 career singles titles and held the world No. 1 ranking five times between 1966 and 1974, said that Nadal needs to change his mindset.
"I would try to get (him) thinking differently. He keeps telling himself, 'I don't have,'" said King, who is also a co-founder of World TeamTennis, which will open its 40th season this summer. "I would keep trying to say what you do have.