Portugal finally breached Iceland's defence just after the half hour mark Tuesday, with Andre Gomes slotting a neat pass to an unmarked Nani at the edge of the six-yard box.
Fernando Santos' side predictably had the best of the action from kickoff, only to be thwarted by an organised opposition defence and the work of Hannes Thor Halldorsson in goal.
Nani finally broke Iceland's resolve in what's the 600th goal in European Championship history.