Controversial boxer Imane Khelif is officially queen of the ring, winning an Olympic gold medal amid a gender row which has cast a shadow over her Paris campaign.

The Algerian defeated China's Yang Liu by unanimous decision in the women's 66kg gold medal bout, with all three rounds going in her favour.

Yang, the reigning Asian Games champion, was unable to repel Khelif's fast and powerful punches, often retreating while failing to land good hits on her opponent.

The result was written on the wall even before the umpire made the announcement, with Khelif already holding one arm in the air looking ready to celebrate.

There was consolation for China earlier on Friday night, after Wu Yu clinched gold in the women's 50kg by taking a 4-1 split decision over Turkey's Buse Naz Cakiroglu.