The Frenchman, who won gold in C1 canoe slalom at Sydney 2000, Athens 2004 and London 2012, is the subject of an episode in the new season of the Olympic Channel original series Legends Live On, which can be watched at olympics.com/olympic-channel.
That episode tells the story of how Estanguet followed in the footsteps of older brother Patrice, bronze medallist at Atlanta 1996, into the sport and ended up beating Patrice to take the sole French spot at the Sydney Games.
"The first person I thought about when I passed the finish line and realised I won was my brother," Tony says in the episode.
The episode features interviews with Tony, Patrice, canoeing rival Michal Martikan of Slovakia, French judo great Teddy Riner, French minister of Sports Roxana Maracineanu and former French president François Hollande.
Estanguet, who was France's flag-bearer at the Opening Ceremony of Beijing 2008, retired after winning his third gold in London and was eventually picked to lead the French capital's candidature to host the 2024 Olympic Games.
"After four Olympic Games, I wanted another thrilling professional challenge. And my dream was to stick to the field of sports," he says.
"I never would've imagined in my wildest dreams that I'd end up as President of the Olympic Organising Committee."
The full episode is available to watch below. All episodes of Legends Live On can be found here.