Wales boss Chris Coleman is expecting a 'real battle' when his side face fellow home nation Northern Ireland in Euro2016's Round of 16.
The Dragons looked set to meet Turkey in the next round before the Republic of Ireland changed the permutations and combinations of the draw with a shock 1-0 win over Italy on Wednesday.
"Northern Ireland will be a slightly different challenge for us - they'd be more physical than Turkey," said Wales manager Coleman.
"They get the ball forward quicker. That's where their strength is. They are superbly organised and defensively so difficult to break down. They are excellent from set plays.
"Michael O'Neill has done a great job to get them through and we know it will be a real battle."