Ireland full back Seamus Coleman will be out for between 3 to 4 weeks with a calf strain.
Everton manager Roberto Martinez confirmed the news in the aftermath of last nights 2-1 win over Manchester City in the Capital one cup semi final first leg at Goodison park.
Ramiro Funes Mori put the Toffee's one up before Navas equalised however Lukaku's 19th of the season was enough to give the hosts victory.
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