Croatian Ivica Olic's participation at Euro 2012 could be in doubt after the striker suffered an injury to his right thigh in a friendly against Norway, a team doctor said on Sunday.
"I cannot guarantee that Olic will play at the Euros," Croatia squad doctor Zoran Bahtijarevic told the Sportske Novosti daily online edition.
The 32-year-old Bayern Munich striker, who will join Wolfsburg after the tournament, picked up the injury during Saturday's friendly against Norway in Oslo, which ended in a 1-1 draw.
"We did the first medical exam at the stadium in Oslo to check the flexibility of the muscle. It seemed fine, but he will undergo a complete scan on Monday in Munich," the doctor said.
Olic said he did not feel any pain, he added.
"I'm an optimist. So far the medical evidence suggests he could (play at the Euro), but let's wait until the scan."
Croatia are drawn in a tricky Group C with reigning champions Spain, Italy, and the Republic of Ireland.
The former Yugoslav republic play their first match at the European Championship, hosted jointly by Poland and Ukraine, against Ireland on June 10.