He enjoyed a prolific pre-season prior to the 2016–17 season, scoring four times, earning praise from new manager René Weiler.[30] However, the signing of Nicolae Stanciu prompted the club to offer Trézéguet out on loan in order to gain playing time,[31] eventually joining fellow Belgian side Royal Excel Mouscron on a season-long loan deal.[32] In his first seven appearances for the club, he was directly involved in five goals, scoring two and assisting three including a solo effort against Gent after starting a run from inside his own half,[33] leading manager Glen De Boeck to label him the "most talented player in our team."[34]