Watch: Richard Williams talks racism in pro sports on Face the Nation

Richard Williams offered a candid take on racism and the sports world on Sunday morning. (Mic Smith/AP) Richard Williams appeared on CBS' Face the Nation on

Richard Williams offered a candid take on racism and the sports world on Sunday morning. (Mic Smith/AP)

Richard Williams appeared on CBS' Face the Nation on Sunday and reveled that he went out of his way to train Venus and Serena to be prepared for the racism they might face as black professional athletes in tennis.

"When they were juniors I had some kids come up to them on the bus and call them all kinds of names... so that I could prepare them for it," he said. "I didn't want them to perpetuate that thought that the world is good and sports is going to be this way. No, sports is always going to be prejudiced."

Williams also revealed why he refuses to watch the all-Williams matches between Venus and Serena. The two have played each other 24 times in their pro careers, with 11 of those matches coming in finals. "I was always afraid to see them play in fear I might tear up my heart this time," Williams said. "Because when I would watch them practice against each other too hard it would remind me of the prejudices I had seen when I was a child. It was like someone was fighting, and to me they were fighting against each other."

Williams was promoting his new memoir Black and White: The Way I See It, which is set to be released this week. Watch the full interview below: