Another INSEP graduate, Diot has spent his entire professional club career to date in France's Pro A, starting out with a five-year spell at le Mans in which he won the French Cup (2009) and was a two-time All Star, as well as playing in the Euroleague. He spent the 2012-13 campaign with Paris-Levallois but has joined Strasbourg where he will play under Vincent Collet. Entering 2013, he had made 23 senior appearances for France, making his debut in a European qualifier against Italy in 2009 before featuring at that summer's EuroBasket. Back injuries saw him miss the 2010 World Championships and EuroBasket 2011. He was previously a part of the French teams that took gold at the U16 (2004) and U18 (2006) European Championships.