The striker says victories against their direct rivals have been key to this season's Scudetto triumph.
“The path towards the Scudetto began against Sassuolo," Lukaku told DAZN. “We changed the way we played, and we were more compact.
“Lautaro [Martinez] and Alexis [Sanchez] played, I was on the bench. But I immediately understood that the team were united.
“We have shown that we are stronger. After the win against Atalanta, I said to myself: 'OK, we are really there for the Scudetto'."