Elena Rybakina into Ningbo Open quarterfinals on return from injury

SHANGHAI–World number one Elena Rybakina reached the quarter-finals of the Ningbo Open on Thursday on her return from injury when opponent Polina Kudermetova retired. The top seed and defending champion was cruising 5-0 in eastern China when the world number 105 from Uzbekistan called it quits because of injury. Moscow-born Kazakh Rybakina will face Poland’s