Rio 2016 organisers have come in for criticism after a series of serious injuries were suffered on the opening weekend.
There have been a series of high-profile casualties with athletes suffering broken legs and collarbones, fractured backs and neck injuries.
While some of the incidents have been unavoidable, others have occurred due to poor organisation.
It has left many wondering if the Games in Rio could be the most dangerous ever.
Here are some of the incidents that have already occurred.
1. Nibali crashes during road race
course in Olympic history.
Pre-race favourite Vincenzo Nibali appeared to be heading for a medal along with Sergio Henao before the pair both crashed out.
Nibali suffered a broken collarbone as a result, with Britain's Geraint Thomas also crashing out.
2. Concern for Van Vleuten
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Another shocking incident during the descent in the women's race on Sunday.
Dutch rider Annemiek van Vleuten had pulled clear but came off her bike on a sharp turn.
She lay motionless while help arrived, leading to fears she was in serious danger.
Van Vleuten was taken to hospital and placed in intensive care but was later diagnosed with three small fractures.
Former British cyclist Chris Boardman slammed the route, claiming there were stretches where crashing would be extremely dangerous.
3. Downie lands on neck during routine
Team GB's Ellie Downie suffered a sickening fall on her neck - before returning to the Olympic arena to complete the competition.
Downie, who had already safely negotiated her way through the bars and beam, was beginning the floor potion of the competition when she suffered her freak accident.
Nottingham-born Downie is an accomplished and powerful tumbler but while somersaulting she failed to get her body all the way around and landed on the mat directly on her head and neck.
Downie immediately got to her feet to try and finish her routine but stepped off after refusing her final tumble.
"I crunched my neck," she said afterwards after her teammates and coaches rushed to her aid. "It sounds pretty gross but I just felt dizzy before my last tumble."
4. Australian cyclist hospitalised
Australian track cyclist Melissa Hoskins was taken to hospital after a crash in training in Rio just three days before the action gets under way in the Olympic velodrome.
An Australian Olympic Committee spokesperson confirmed the crash took out four of the five-strong team pursuit squad, with only Annette Edmondson staying upright.
The three other riders - Ashlee Ankudinoff, Georgia Baker and Amy Cure - to hit the boards suffered grazes, while the 25-year-old Hoskins was taken to hospital as a precaution.
5. Armenian weightlifter dislocates elbow
Armenian Olympian Andranik Karapetyan suffered a horror ELBOW dislocation during the 77kg weightlifting event at the Rio Olympics.
The 20-year-old suffered the freak injury during his second attempt at trying to lift 195kg on Wednesday evening.
Karapetyan, the reigning European champion, screamed in pain as his joint popped out during the clean and jerk of his lift.