BBC say:
Michael Ballack sits out the opening World Cup match between Germany and Costa Rica in Munich.
The Chelsea new boy and Germany skipper has a calf strain and has been rested, with Tim Borowski stepping into midfield for the hosts.
Costa Rica had doubts over keeper Jose Francisco Porras, midfielder Mauricio Solis and defender Gilberto Martinez.
However, all three have been passed fit and start in a team featuring former Manchester City striker Paulo Wanchope.
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