Denmark has a habit of underperforming against weaker opponents. This will be the first match without the important Thomas Gravsesen. No Dennis Rommedahl (has been sharp lately but is injuried) or Jesper Grønkjær either. I see a pretty strong Danish team but not much firepower.
Yes, the Spain game was probably a fluke - but Northern Ireland did beat England a year ago too. And David Healy is a dangerous man.
All Danish matches against Northern Ireland:
9 01-09-2001 1 - 1 København, Danmark VM-kvalifikationskamp
8 07-10-2000 1 - 1 Belfast, Nordirland VM-kvalifikationskamp
7 13-10-1993 1 - 0 København, Danmark VM-kvalifikationskamp
6 18-11-1992 0 - 1 Belfast, Nordirland VM-kvalifikationskamp
5 13-11-1991 2 - 1 Odense, Danmark EM-kvalifikationskamp
4 17-10-1990 1 - 1 Belfast, Nordirland EM-kvalifikationskamp
3 26-03-1986 1 - 1 Belfast, Nordirland Venskabskamp
2 06-06-1979 4 - 0 København, Danmark EM-kvalifikationskamp
1 25-10-1978 2 - 1 Belfast, Nordirland EM-kvalifikationskamp