New Delhi, Oct. 31 -- Serena Williams, the legendary tennis star with 23 Grand Slam titles, has opened up about accusations from her playing days. The retired icon revealed that a former opponent blamed her repeated victories on supernatural forces rather than skill.

On her Stockton Street podcast this week, Serena, 44, shared a story with co-host and sister Venus Williams, plus guest singer Ciara. Serena kept the rival's identity private, but the claim stunned listeners.

"The craziest thing I ever heard about me was that I did witchcraft, black magic, because I was beating some girl a lot," Serena said. "And so she claimed that we did black magic to beat her."

Venus Williams, 45, chimed in with more details.

"From what I understand, ...