The Wolfsburg-bound attacker has picked up a knock ahead of his side's opening game in Poland and Ukraine, and could potentially miss out on the tournament altogether.
Croatia striker Ivica Olic has been ruled out of Euro 2012 with a thigh injury, the country's football federation has announced.
Croatia coach Slaven Bilic had been sweating over the fitness of the Bayern Munich striker since he sustained a thigh injury in the 1-1 friendly draw against Norway at the weekend.
A scan has revealed 'a partial rupture of the biceps muscle' of the 32-year-old's right thigh, with an estimated recovery of four to six weeks.
Bilic has acted quickly to replace Olic, calling Dnipro's 24-year-old striker Nikola Kalinic, who has 13 caps to his name, into the squad.
Croatia will kick off its Euro campaign against Republic of Ireland before taking on Italy and Spain.
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