Anybody grow up with a future pro?

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My cousin is Bob Banck who I am guessing is mostly an unknown on here. But he was a professional tennis player. He was more known as a tennis coach. He coached some fairly big names back when these players were in their primes. Jimmy Arias and Aaron Krickstein male tennis players. And Monica Seles, Mary Jo Fernandez, and Mary Pierce female players. As a kid I knew him as Bobbie. Shot pool with him. Played racquetball. Unfortunately I didn't see him much or grow up with him because we were in different cities.