By the 2003–04 season, Boruc was very much a first-pick for Legia and played in all 26 of their league fixtures. In June 2004, Boruc scored his only goal for the club, converting a penalty kick in a home game against Widzew Łódź (final score: 6–0) and then celebrated by waving the corner flag. Legia finished second in the league and qualified for the following season's UEFA Cup. Boruc also made his first appearance for Poland in April 2004, playing in a scoreless draw against the Republic of Ireland.