Imagine a crib with a mobile of tennis balls overlooking a baby with ping pong paddles taped to his wrists so he can try to swat at them. This baby was Andre Agassi. His father worked him hard from an early age, and, as a result, he became one of the best tennis players of all time.

When Agassi won his first Grand Slam title at Wimbledon, he called his dad to tell him the news, to which he responded: “You had no business losing that fourth set.”

Andre Agassi worked his ass off to become one of the most successful tennis players, but he hated it, mostly due to his father. He confessed in his autobiography, Open, “I play tennis for a living even though I hate tennis, hate it with a dark and secret passion and always have.”