Na 26 June 2018, Nainggolan bịanyere aka na Inter Milan maka € 38 nde (€ 24 nde gbakwunyere Davide Santon na Nicolò Zaniolo, nke ruru € 14 nde) ruo June 2022. O nyere aka na asọmpi mbụ ya na 1 Septemba, na-enyere ndị ọbịa aka imeri Bologna 3 <unk> 0.Na 3 Ọktọba 2018, Nainggolan nyere goolu na 2 <unk> 1 mmeri mmeri na PSV Eindhoven na ogbo nke otu egwuregwu nke Champions League iji ghọọ onye mbụ nke Belgium iji nweta ihe ịga nke ọma na asọmpi ahụ maka Inter. Ajụjụ: Mgbe Nainggolan sonyeere Inter Milan?
26 nke June 2018