Despite his heavy praise of Delap, Maresca went on to say that Chelsea striker Jackson is still his 'perfect' striker due to the Senegalese showing good form with the Blues at the start of the season before his injury.
Maresca added: "My perfect number nine is exactly Nico Jackson. We already have a number nine. It's not summer now. If we can have a copy of Nico, it's OK. I have said many times, and you can see as well, with Nico we are a better team. Nico is the one we need.
"Last season, he scored goals without penalties. This season he scored goals until he was injured. Now, hopefully he can score more goals without penalties. We are happy with Nico. And about next season, it's not the moment [to talk about transfers].
"But we also have a good nine [in Nico Jackson]. He's doing well since we started. Unfortunately, we've missed him, and sometimes you need to miss players to realise how important they are for you. With Nico, we are a completely different team compared to when he was injured. We are happy with Nico as our striker."