The Inner Game of Tennis: The Classic Guide to the Mental Side of Peak Performance

W. Timothy Gallwey's 1974 performance classic that introduced the 'inner game' framework: the idea that peak performance depends less on mastering an opponent than on quieting the internal voice that interferes with natural ability. Gallwey, a Harvard tennis captain and meditation practitioner, argues that the 'Self 1' (the teller, the judge, the overthinker) interferes with 'Self 2' (the body's innate learning and performance capability). The method has been adapted beyond tennis to coaching, music, skiing, and business.

Gates first read it in the mid-1970s and has reread it several times. He writes: "It's the best book on tennis that I have ever read, and its profound advice applies to many other parts of life. I still give it to friends today." He traces a specific management habit to it: after a Microsoft team shipped a bug requiring a costly disc recall, Gates told them, "Today you lost a lot of money. Tomorrow, come in and try to do better." That response — non-judgmental, forward-looking — is exactly Gallwey's method.

For a founder, Gallwey's distinction between Self 1 (the internal critic who second-guesses every move) and Self 2 (the capability that emerges when you stop interfering) is a practical tool for managing your own performance in high-stakes situations — fundraising pitches, board meetings, product launches. The book is not about tennis; it is about why trying harder and thinking more often makes things worse, and what to do instead. Satya Nadella has also cited Gallwey's work as influential, making this one of the few books shared by two Microsoft CEOs.