Michael O'Neill insists Northern Ireland are all set for their first major international tournament since 1986 - referring to their preparation as "flawless".

O'Neill's side face Poland in Nice exactly 30 years to the day from their most recent fixture at a finals when Brazil defeated them 3-0 in Mexico.

And ahead of their first ever appearance at a European Championships, O'Neill is adamant the 23 men he has chosen are in perfect shape following training camps in Manchester, Dublin, Belfast, Austria, Slovakia and Lyon.

"The players are very well prepared," O'Neill insisted.

"I don't think there's a need for a final message, I think they understand the significance of the game. The preparation we've done has been flawless,basically."

"I don't think I've ever felt that a team has been as well prepared in the four years I've been in charge in terms of what we've managed to do with the squad, the work we've done week after week, how the players have taken that on board."

O'Neill also rejected any fears that striker Kyle Lafferty would miss out despite providing the nation with a scare when he hobbled out of training with a groin injury earlier in the week.

"We've no doubts whatsoever about Kyle's fitness," O'Neill said.

"In terms of where we are as a squad, I don't think we could be in a better shape in terms of the injury situation and the preparation for this team going into the game."

Poland head coach Adam Nawalka has identified Northern Ireland's collective spirit as their biggest strength as he tries to guide his nation to a first European Championship finals victory.

"We are expecting a tough opponent, a tough match and a highly demanding match," Nawalka said.

"It will be a difficult opponent and as for how we approach it... we don't want to talk about personal names. Northern Ireland are a team, their strengths come from team work and team effort. I think we will be able to face them in all aspects of the game."

Nawalka was keen to stress how Romania's performance against France in the competition's curtain-raiser on Friday night also proved that any perceived minnows will not lie down.

"It's the European Championship and the best teams will compete here so there are no weak teams here in the tournament," he added.

"Every match doesn't have a favourite and the opening match just proves that. The one between Albania and Switzerland was very equal and the result could have been different."

"We will try to work and play this match to win it and thinking about winning it but we need to remember that the Northern Irish team is a very strong team that has won its group, hasn't lost in 12 and they will set the bar high. We are expecting that."

As is the case with O'Neill, Nawalka will be taking charge at a major tournament for the first time in his career.

He played at the 1978 World Cup, though, and he believes that experience, coupled with his role as number two alongside Leo Beenhakker eight years ago,has prepared him for taking the reins in France.

"There's no stress here," Nawalka added.

"It probably comes with the experiences, both as a a player and a coach. It's significant for me, I've been at the European Championship as an assistant to Leo Beenhakker in 2008 and I'm trying to use those experiences here."

"Perhaps I feel a kind of positive pressure of being motivated. I don't feel tired at all, I always feel ready to work even more and it's a great feeling."

Poland's biggest injury doubt, midfielder Kamil Grosicki, trained at the Stade de Nice on Saturday afternoon and a decision will be made on his ankle problem ahead of the game on Sunday."