Simone Biles' run at Olympic history hit a roadblock on Monday when a mistake on the balance beam kept the USA gymnastics star from a record-tying fourth gold medal in Rio. 

Rio-time updates: follow the action with our daily live blog

The 19 year-old was in the middle of her routine when she landed awkwardly while completing a front somersault. Her right foot slipped and she reached down with both hands to steady herself. She rolled her eyes as she waited for her score of 14.733 to be posted.Bronze went to Biles, Sanne Wevers won gold and silver went to USA's Lauren Hernandez (Photo by Laurence Griffiths/Getty Images)

While it was still good enough for bronze behind gold medallist Sanne Wevers of the Netherlands and US silver medallist Laurie Hernandez , it also means Biles' bid to become the first woman to win five golds in a single Olympics is over.

Rio 2016 artistic gymnastics schedule and results

Already a three-time gold medallist (all-around, team and vault) when she walked onto the floor on Monday (15 August), Biles was a favourite on beam as the reigning world champion.

Biles' mistake on the beam meant she only won bronze this time (Getty Images/Alex Livesey)

She topped qualifying last week and had just completed the most difficult part of her routine - a tumbling pass that stretches the length of the four-inch wide slab of wood - when she missed the landing following her punch front flip.

The mistake opened the door for Wevers, who put together an elegant set to earn a 15.433. Hernandez, who helped the USA to team gold last week, followed with a 15.333 to give the 'Final Five' seven medals overall at Rio 2016.

"I'm not sure (what happened). I didn't even know my foot slipped until I got off the beam and they replayed it. I don't really know what happened."

Astonishing Biles leads USA 'final five' to Olympic glory

Biles has another chance to win a gold medal on Tuesday (16 August) in the floor exercise final. She's attempting to join Larisa Latynina, Vera Caslavska and Ecaterina Szabo as the only women to win four golds during an Olympic Games. 

"I'm not disappointed in the medal that I received because anyone would love to have a bronze at an Olympic Games," Biles said afterwards. "I'm disappointed in the routine that I did. Not so much the entire routine just the front tuck I guess, because the rest of the routine was pretty good."

The silver medal was a bit of redemption for Hernandez, who has been battling a minor injury and was held out of the all-around competition. Earlier, Ri Se Gwang of DPR Korea took gold in men's vault while Eleftherios Petrounias of Greece topped the podium on the still rings.