Maresca has faced growing scrutiny from supporters after a poor run of form, with Chelsea winning just two of their last nine league games.
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The Blues’ struggles have left them as outsiders in the race for a top-four finish, piling pressure on the head coach.
Speaking on Bloomberg TV, the Chelsea chief said: "He's doing a great job.
"Chelsea started the season very well. The last six weeks have been, you know, finding their feet a little bit more.
“But Enzo has clearly done a great job in bringing the team together, bringing the talent through.
“And we're very optimistic for the rest of the season and how that plays out."