According to the Dutch Newspaper De Telegraaf : the market is being swamped with tickets for the Robbie show on Sunday, as many Dutch fans would rather follow their team at the World Cup.

Any real Robbie fan wouldn't miss this, choosing rather to video the game instead. What a dissapointment for Robbie should he have to play to a half empty stadium. They should give them away to real fans that maybe can't afford to go.... hopefully they'll lose after playing really badly, so that they're really annoyed to have missed the show.
:-)