Michael O'Neill has urged his young Northern Ireland players to make the most of their World Cup qualifying opportunity when it comes along. Northern Ireland take on Iceland this evening in their final warm-up game before the World Cup qualifiers begin in September. And while O'Neill is at pains not to overload the squad ahead of the opening fixtures he is keen for them to realise the importance of what lies ahead "I think there's a balance between being too focused on it," said O'Neill. "With this group of players I think drip feeding things into them is more important than anything else. "For most of these lads when it comes September this will be their first opportunity to play in a World Cup qualifying campaign. "That point is the time to talk about the significance of the opportunity, that's the biggest thing when you look at it."