Wimbledon champion Simona Halep has retired from the Wuhan Open after suffering a lower back injury.
Despite the intervention of a physiotherapist, she was forced to withdraw when trailing 5-4 in the first set against the Kazakh wildcard.
Meanwhile, Ashleigh Barty defeated Sofia Kenin 6-3, 7-5 to secure a place in the quarterfinals.
Third seed Elina Svitolina also progressed against Svetlana Kuznetsova.
Romelu Lukaku makes Belgium's World Cup roster
Romelu Lukaku was named to Belgium's 26-man World Cup roster on Friday despite the team's all-time leading scorer being limited to only five appearances for Napoli this season due to injuries.
France reveals World Cup roster; Camavinga, Chevalier left off
France's World Cup roster includes a star-studded assortment of talent, with Real Madrid infielder Eduardo Camavinga arguably the most notable omission.
Punjab crack under pressure to leave IPL playoffs hopes in balance
Punjab Kings set the early pace in the Indian Premier League by going seven matches unbeaten, but a run of five straight defeats has left their playoffs hopes in the balance and assistant coach Brad Haddin concedes they have failed to deal with the pressure.
Mbappe booed on return as Real Madrid beat Oviedo 2-0
Kylian Mbappe was greeted with a chorus of boos and whistles from Real Madrid's own fans as he returned from a hamstring injury during his side's 2-0 LaLiga home win over Real Oviedo on Thursday.
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