On 5 December 2004, playing for Servette FC in an away game against FC Schaffhausen, Diogo set up a goal for Jean Beausejour in the 87th minute of the game. By way of celebration, he jumped up on the metal perimeter fence separating the fans from the pitch. Unnoticed by him, his wedding ring caught in the barrier (Diogo had married not long before). As he jumped off the fence, much of his finger tore off along with the ring. To add insult to injury, referee Florian Etter then penalized him with a yellow card for excessive time-wasting with his "celebrations". In fact, the match stewards were searching for his finger. Later that night, Diogo was taken to a Zurich hospital, but the doctors failed to re-attach the severed part of the finger and advised that the remaining part of his finger be amputated to the first joint.