During the next season, Berbatov scored 16 goals and made important contributions to the club's Champions League campaign, scoring in a 4–2 win over English club Liverpool in the quarter-finals as Leverkusen eventually reached the final. In the final itself, against Real Madrid, Berbatov came on as a substitute for Thomas Brdarić after 38 minutes before Leverkusen lost 2–1. Leverkusen also finished as runners-up in the Bundesliga behind Borussia Dortmund, and lost the DFB–Pokal final 4–2 to Schalke 04, thus completing an unusual treble of runners-up finishes. Berbatov established his place as the first-choice forward during the next season, 2002–03, and netted his team's goal against Manchester United on 24 September 2002, during a 2–1 defeat for Leverkusen. He scored 16 goals in 24 league appearances during the 2003–04 season, before the following two seasons saw the Bulgarian raise awareness of his talent by netting 46 goals in the league over the two seasons and five times in the 2004–05 Champions League. During this time, he was linked with numerous foreign clubs, including Celtic, Atlético Madrid and Liverpool.