Frank de Boer
At 21, Oleguer signed with FC Barcelona, spending his debut season with their reserves. He would make his first-team debut during a 2002–03 UEFA Champions League match against Galatasaray SK, a 3–1 home victory where he came on as a late substitute for Frank de Boer. During that season he played for both sides, on occasion being a last-minute addition to the main squad.