The Italian coach, who masterminded Leicester's promotion back to the Premier League, is highly sought after.
Per Fabrizio Romano, the Blues are ready to complete a deal with Maresca and the Foxes.
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He has said yes to the Chelsea project, while the clubs are now discussing terms over his release.
Leicester will not make the process easy on Chelsea, but will be powerless if the Blues pay out Maresca's release clause.
Maresca is likely to sign a two-year deal with the Blues with the option for a third year.