An interview about the role of psychology and understanding behavior in tennis, with experienced tennis player and coach Carlos Goffi. Goffi has coached tennis for more than 30 years, has coached John McEnroe, and is the author of the well known tennis book Tournament Tough.  We talk about reading opponents' physical tells and their mood, about psychological strategizing, and about the impact of personal life factors on a player's ability to compete. We also talk about Andre Agassi's claim that he had a very reliable tell on Boris Becker.