Danish Under-16 international Per Weihrauch trialled with Norwich in July 2004 after being recommended to the Canaries by Steen Nedergaard. He played for the Under-19s in their 4-0 defeat of Northampton during this period. Per was then with Danish side Hvidovre.

Although Norwich were hopeful of signing him, on a visit to Holland he decided that the lure of top flight Dutch football and the chance to play under the great Ronald Koeman saw him opt to join Ajax. "I had also been to trial at Everton and Norwich and had the possibility to go to Tottenham, Arsenal and PSV. But Ajax looked to be the most professional. They have many full time employees around the youth side and that is cool. In case I had gone to England, it might have been difficult if I hadn't made a big breakthrough," he said.

In May 2006, the Ajax starlet was linked with a switch to Chelsea. This materialised during the summer of 2006 and Per played in Chelsea's youth team. However he had to announce his retirement in April 2008 due to chronic hamstring injury