Kei Nishikori and Naomi Osaka swapped their rackets for Nintendo Switch controllers and met on court in the Mario Tennis Aces video game on Sunday during the "Stay at Home Slam," a virtual charity tournament featuring eight star players and their celebrity doubles partners.Nishikori and DJ Steve Aoki squared off against Osaka and model Hailey Bieber in the first round of the competition streamed live on Facebook, but the latter pair forfeited after a weak internet connection halted play.Nishikori and Aoki then won in the next round and advanced to the final, but lost to Taylor Fritz and onl…READ FULL ARTICLE