Which famous tennis player’s father are we talking about here?

He was intent on having a child win all four tennis Grand Slam tournaments. He learned tennis by watching tapes of champions and took a very systematic approach to the game. He called (Blank’s) two older siblings “guinea pigs” in the development of his coaching techniques.

He gave Blank paddles and balloons when he was still in a high chair. When Blank started playing tennis, his ball collection filled 60 garbage cans with 300 balls per can, and Blank would hit 3,000–5,000 balls every day. When Blank was five years old, he was already practicing with pros such as Jimmy Connors and Roscoe Tanner.