Washington [US], April 21 (ANI): Actor Zendaya who portrays a former tennis prodigy in her next film has revealed what tennis ace Serena Williams thought about her latest performance in ‘Challengers.’ The actress, who plays Tashi Duncan, a tennis player-turned-coach in the Luca Guadagnino-directed film, recently revealed details of her conversation with the legendary athlete to Entertainment Tonight. “She was like, ‘I know there definitely weren’t real [tennis] balls,'” Zendaya recalled. “She knows. She’s the best of the best.” The actress from “Dune: Part Two” also mentioned that Williams off…