Biles posted a total of 58.399 after a delivering stellar performance on the vault, keeping up the pressure on the bars, excelling on the beam, and, despite a stumble on the floor, nailing her tumbling routine to triumph.

The American, who won her first all-around world title as a 16-year-old in Antwerp a decade ago, has claimed a total of 27 world medals – including 21 gold medals – having also led the US women’s team to a seventh consecutive title on Wednesday.

She has also surpassed Belarusian Vitaly Scherbo’s record of 33 medals in total at the Olympics and world championships.

“I was emotional because 10 years (ago) I won my first worlds, now we’re back here. So it was emotional,” said Biles.

“It means everything to me, the fight, everything that I’ve put in to get back to this place to feel comfortable and confident enough to compete.”

The American, who returned to international competition after a two-year hiatus from the sport to protect her mental health, now has five skills bearing her name: two on floor exercise, two on vault, and one on balance beam.

“I’m proud of the work that I’ve put in to get to this point. I don’t think it will hit me until maybe I retire and then look back and see everything that I’ve done,” added Biles.

Former world champion, Brazilian Rebeca Andrade, was second with a total of 56.766 after a superb floor routine. American Shilese Jones completed the podium with a score of 56.332.

Biles is set to compete in the vault and uneven bars finals on Saturday before beam and floor exercise finals on Sunday.