Career
Mertens made his Belgian Pro League debut at 18 October 2014 against R.S.C. Anderlecht. He replaced Ivan Obradović as a 88th-minute substitute in a 1-1 draw at Achter de Kazerne.
Mertens made his Belgian Pro League debut at 18 October 2014 against R.S.C. Anderlecht. He replaced Ivan Obradović as a 88th-minute substitute in a 1-1 draw at Achter de Kazerne.
