It was a first win in the Champions League this season for La Dea and was achieved under new coach Raffaele Palladino.
Lookman struck the opener in the 3-0 win on Wednesday night and later said: "Today was a crucial win. I think we showed what we had already shown in the second half in Naples, even if the result there wasn't what we wanted. But tonight we showed our DNA.
"I think we tried especially in the first half, we produced a lot, we created a few chances. But it was difficult to convert in the first half. But obviously the coach told us at halftime to be patient, that the goals would come, and that's what happened in the second half. We scored very quickly, three goals in seven minutes or so. This is a good sign for everyone: be proactive, attack."
On getting on the scoresheet, the Nigeria international added: "I think getting back to scoring and rediscovering the feeling of scoring is important to me.
"But the most important thing for me is the team and that the team won tonight. We'll take this win and already focus on the weekend's game. We want to win that one too and continue this journey.