Olympic champion Alexander Zverev plans to return to tennis from a severe ankle injury iat exhibition tournaments in the Middle East in December and then plans to start the 2023 season at the new United Cup mixed team event in Australia. Zverev’s brother, Mischa Zverev, said on Eurosport that he is registered for the Diriyah Tennis Cup in Saudi Arabia December 8-10 and the World Tennis League in Dubai December 19-24. “He needs a few matches before the new season. So we registered for a few exhibition tournaments,” Mischa Zverev said in the report Wednesday. Former world number 2 Zverev, 25, ha…