 He made his Danish Superliga debut for Brøndby IF in April 1997, and played two games as Brøndby won the 1996-97 Superliga championship.He made his debut for the Denmark national under-21 football team in August 1997.Jensen went on to play 21 games for the under-21 team until December 1999, and was named 1998 Danish "under-21 Talent of the Year".