Part of Kevin Keegan's Manchester City revolution, he played just three times in Cameroon's qualifying run for the World Cup.
But Mettomo was called up for the African Nations Cup and looks likely to remain a part of the set-up for Japan and Korea.
The 25-year-old made his name at French side St Etienne before moving to Maine Road.
Although not a regular first-team player with Cameroon, he offers the versatility of playing anywhere in the back four or in a defensive midfield capacity.