[2] In the summer of 2011, Premier League club Manchester United offered to sign him for €1 million, but Lyon rejected the bid.
From the 2013–14 season, he was part of the first-team squad of Lyon, where he had to compete with Rémy Vercoutre, Anthony Lopes and Mathieu Gorgelin.
After two seasons as reserve goalkeeper, Defourny moved Tubize, where he once again became the starter after the departure of Quentin Beunardeau.
In 2018, the club was still administratively able to save itself due to the bankruptcy of Lierse, but in 2019 Tubize relegated to the Belgian First Amateur Division.
[10] There he started as the backup to Ortwin De Wolf, but when he was injured in the league match against Sporting Charleroi at the end of November, Defourny took his place.