Since signing for Chelsea last summer, Palmer has scored 31 goals and bagged 19 assists in just 53 games. He is currently showing that last season's numbers were not a fluke - with some Blues fans calling him the "best in the world".
Head coach Maresca also heaped praise on him but felt he could do even better.
The Italian said: "[Palmer] scored four, I told him he could have scored two or three more. I knew Cole from years ago at City, he is a top player and just has to continue in the same way."