Romania striker Ciprian Marica has been rushed to hospital with a head injury.
The 22-year-old Stuttgart player suffered the injury in a collision with team-mate Marius Niculae during training on Tuesday.
"He has gone to the hospital and we will have to wait and see," confirmed a team spokesman.
Marica was an unused substitute as Romania held France to a 0-0 draw in their opening Group C clash on Monday.