Balotelli: Premature end to training

In order to reach the last eight, the Italy must beat the already-eliminated Irish, and hope the result in the Spain-Croatia match goes their way.

However, they may have to cope without Balotelli, who started their opening two games, 1-1 draws with Spain and Croatia.

The Italian football federation says the 21-year-old had to abandon training due to "a minor right knee problem," and added that he will be re-examined by team physician Enrico Castellacci on Sunday.

If he misses out, Antonio Di Natale, who came off the bench to score against Spain, could be in line for a starting berth.