Italy coach Cesare Prandelli lamented his siude's failure to exploit their first half domination and eventually settle for a draw with Croatia.
"When you're on top and playing well you have to kill off the game," he said.
"We know that one cross or a deflection can cancel out everything you've done. You have to close out the game, we need to be more clinical and determined."
Italy will now need to beat Ireland in their final group game and hope that the result in Croatia's game against Spain is kind to them if they are to progress.