Complex sentence: He made his first team debut on 3 December 2014 in the Belgian Cup against K.R.C. Mechelen replacing Youri Tielemans after 79 minutes in a 4--1 home win.
Split into simpler sentences: He made his first team debut on 3 December 2014 in the Belgian Cup against K.R.C. Mechelen. He replaced Youri Tielemans after 79 minutes in a 4--1 home win.