Mertens exits the professional sport after a decorated career across European leagues. He began with Utrecht before starring at PSV, and then became Napoli's all-time top scorer with 148 goals in 397 appearances. Closing out his career with a three-season tenure at Galatasaray, he helped the team win the Super Lig title three times along with a Turkish Cup and a Super Cup.
Internationally, Mertens played a key role in Belgium’s golden generation, earning 109 caps and scoring 21 goals between 2011 and 2022.