A late goal from Michael Ballack saw the Germans through to the final by virtue of a 1-0 win over co-hosts South Korea.
They will go on to face the winner of the Brazil/Turkey semi-final tomorrow afternoon.
Hamann played the full 90 minutes of the game and is a dead cert to start in the final in Yokahoma on Sunday.
Haman came to St James Park in a £5.25million deal from Bayern Munich in August 1998.
One year, and 22 appearances, later he made the switch to Liverpool for a fee of £8million.