Claude Puel
During the second half of the 2009–10 Ligue 1 season, he was called up to the first team by manager Claude Puel and appeared on the bench in the team's 1–0 victory over Montpellier on 2 May 2010. Three days later, Lacazette made his first team debut in a Ligue 1 home match against Auxerre. On 3 July 2010, Lacazette signed his first professional contract agreeing to a three-year deal. Due to still having another year left on his "aspirant" (youth) contract, the contract would start on 1 July 2011.