The Inner Game of Tennis is a classic guide to the mental side of sports performance. Rather than focusing only on physical technique, W. Timothy Gallwey explores the “inner game”—the struggle against self-doubt, anxiety, distraction and overthinking that can affect performance before a player even hits the ball. The book introduces the idea of achieving relaxed concentration and trusting the body's intuitive abilities.

First published in 1974, the book has influenced athletes, coaches and performers far beyond tennis. The 50th-anniversary edition features a new foreword by Bill Gates and applies Gallwey's ideas to areas such as work, creativity, personal development and peak performance.