It was Lukaku's 20th Serie A goal of the season.
"I'm really happy with the win today; it was a complicated game. We took a big step and need to continue down this road," he told Inter TV.
"It's a great moment for me; I made the right decision coming here. I'll do everything I can to help the team because I'm nobody without my teammates. The group is the most important thing. We have our aim and need to keep this up."
"We've all grown a lot. We deal with pressure better and turn it into positive energy. This helps us on the pitch and we need to continue in this manner."
Finally, a special message: "Happy Easter to all Inter fans with the hope that they can spend some time with their families."