Double gold medallist Yannick Agnel says Rio 2016 will be his last Olympic Games after failing to defend his 200 metre freestyle title.
Agnel, 24, won gold at London 2012 in both the individual 200m and 4x100m relay, as well as a silver in the 4x200m.
While he is still yet to compete in the latter in Rio, Agnel says he will be retiring from individual events after a tumultuous few years.
"There is still a race or two to swim and then of course we will see later, but I think it was my last race in individual international competition," the Frenchman said after finishing 19th overall in Sunday's preliminary heats for the 200m free.
"This is my last Olympics, for sure. If I continue four years like the past four years, you will find me between four planks.
"I am disappointed, very disappointed. But I gave everything, I really did my maximum. I did everything I could.
"It was already a victory in itself to be here, to show everybody that despite everything I could change my luck and be competitive.
"That's what I tried today and even if it didn't happen, I'm happy to be here and have tried to defend my title."
When asked what he was missing, Agnel said: "Many things, physical freshness, consistency over the last few seasons, perhaps there was also some nervousness."