Germany?s Per Mertesacker heads the ball during the squad?s final training session at ?Millennium Stadium? in Cardiff, Wales, United Kingdom, 31 March 2009. The German squad faces the Welsh side for a FIFA 2010 World Cup qualifier on 01 April. Photo: Achim Scheidemann

- Image ID: D4K4WM
Germany?s Per Mertesacker heads the ball during the squad?s final training session at ?Millennium Stadium? in Cardiff, Wales, United Kingdom, 31 March 2009. The German squad faces the Welsh side for a FIFA 2010 World Cup qualifier on 01 April. Photo: Achim Scheidemann
dpa picture alliance archive / Alamy Stock Photo
Image ID: D4K4WM