Arsenal's Eduardo returned to his native Brazil to recover from his horrific injuries sustained against Birmingham City.
However he has now taken doctor's advice and has decided to stay behind and concentrate 100% on his recovery program.
"According to the rehabilitation plan, I will continue to work in Brazil and watch the Euro from here. I really wanted to be with the boys, but it is impossible.
"The Brazilian television will transmit all the games. I will support for Croatia with all my heart."
Speaking to the Croatian press he stated he is very happy with the physiotherapy treatment.
"I am working a lot. I undertake physiotherapy every day and now I feel much better. Everything is going according to schedule and I stick to the programme" he said.
A long recovery is ahead of him but September is being mentioned as a major milestone.
"It all depends on the physiotherapy. This could take four, five months; it is still not possible to say precisely when. It will depend on how the doctors estimate my recovery."