Denmark's unlikely victory over the Netherlands on Saturday proves you cannot take anything for granted in international football and gives England and Ireland hope that the unfancied teams can triumph at Euro 2012.
The Danes, marshalled at the back by Daniel Agger and Simon Kjaer, put on an outstanding defensive display to deny Robin van Persie and co to throw Group B wide open and leave many who had predicted the Dutch as potential winners of the tournament looking silly.
Holland will hope they recover in a similar way to Spain in the World Cup two years ago and go on to claim the trophy after a shock opening group defeat but Denmark's win offers Morten Olsen's team - and other countries - belief that the underdogs can have their day in Poland and Ukraine.
Like Spain's 1-0 loss to Switzerland in South Africa, Bert van Marwijk's side wasted plenty of good chances to win the game after going behind to Michael Krohn-Dehli's goal in the first half. Stephan Andersen made a couple of outstanding saves while Arjen Robben was wasteful in front of goal, hitting the post when he had at least two team-mates in better positions to pass to.
But what the result does for the tournament is of greater consequence than the Netherlands' poor finishing because it gives England, Ireland and others the impetus to go out and cause an upset themselves.
Ireland take on Croatia, Italy and Spain in their group with nothing to lose as everyone is expecting them to be well beaten while an injury-hit England are hoping to make it out of a group containing France, Sweden and Ukraine but, beyond that, hopes are not high.
However, if they adopt Denmark's approach there may be joy for Roy Hodgson and Giovanni Trapattoni's sides after all.
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