Britain's Alex Yee has won gold in the men's triathlon with a stunning late victory.
The 26-year-old came into this summer's Olympics as one of the favourites for his event, along with New Zealand's Hayden Wilde.
He was over 10 seconds behind Wilde with around 200 metres to go but produced a phenomenal comeback to earn gold - Team GB's fifth of the games so far.
At the last Olympics, in Tokyo three years ago, Yee walked away from his debut games with two medals and came to Paris as one of the new triathlon stars taking over the mantle from the Brownlee brothers.
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However, the run-up to the event was overshadowed by worries over water quality in the River Seine.
Two training swims were cancelled due to sub-standard water despite Paris having sunk €1.4bn (£1.18bn) into making the river ready for the event.
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This came after heavy rains on Friday and Saturday in the French capital.
The event was eventually postponed until Wednesday after tests in the early hours of Tuesday morning revealed the water was not clean enough for the race to take place.
In the women's event, which took place earlier in the day, Team GB's Beth Potter secured a bronze medal.