Simone Biles wins all-around gymnastic gold at Rio Games in US one-two

There are some athletes which struggle to live up to the hype -- but in Rio it was the hype which failed to keep up with Simone Biles.

The US star showed just why she's the talk of town with another sublime showing to win gold in the women's all-around final Thursday.

Biles, competing at her first Olympic Games, made a mockery of those who doubted her ability to cope with the occasion and added pressure of being the outstanding favorite.

Biles took gold ahead of US teammate Aly Raisman and Russia's Aliya Mustafina after finishing off with a dazzling floor routine.

The 19-year-old not only confounded her opponents but appeared to do similar to the laws of gravity.

Yes, there was a moment where she seemed human -- her routine on the bar was below her best -- but even that is beyond most.

By the time she left the floor after recording the highest score of the night, 15.933, Biles had already achieved sporting immortality by becoming the first woman in 20 years to win back-to-back world and Olympic all around titles.

Biles was the star attraction at the gymnastics all-around final.

A three-time world champion in the all-around and a four-time U.S. all-around champion, Biles has won 14 world medals (10 gold, two silver, two bronze), the most ever for a U.S. female gymnast.

Biles led from the first event after an impressive vault.

Biles could still win three more gold medals before the Games with the teenager set to challenge in the beam, vault and floor.

Her triumph makes her the fourth American in succession to win the title -- following the successes of Carly Patterson, Nastia Liukin and Gabby Douglas -- which is the longest winning streak by a country in the Olympic discipline.