Tennis coach David Ranney offers methods for controlling nerves, improving focus and making in-match adjustments in his book, Tennis: Play the Mental Game. Ranneys book provides clear, easy-to-follow mini-lessons and tips that will benefit players of any level, said Billie Jean King, a six-time Wimbledon singles champion. Tennis: Play the Mental Game discusses four core principles: consciousness, focus, breathing and judgment. It also offers 28 lessons on mental concepts, 11 lessons on strategy and seven lessons on strokes and other subjects, plus 14 tennis terrific drills, two quizzes, and some tennis strategy you won't find anywhere else.