won three Danish championships in a row, and the next year's UEFA Cup saw one of the biggest upsets in Brøndby history, as a 3–1 home defeat to Karlsruher SC was changed to an aggregate win when Brøndby beat the team of Euro 1996 winner Thomas Häßler 5–0 away in Germany. Most importantly for the club's economy, Brøndby qualified for the new format of the European Cup, rebranded as the UEFA Champions League. The Champions League qualification meant six guaranteed matches in a group stage with three of the biggest teams of Europe, and when they were paired with Barcelona and later finalists Manchester United and Bayern Munich, Brøndby faced very economically attractive matches. Despite winning 2–1 over Bayern in the first match of the group stage, Brøndby conceded 18 goals in 6 matches and were eliminated with a single win to their name. Skovdahl decided to take a stab at coaching at Scottish club Aberdeen and Brøndby took a more Scandinavian approach, in search of stable success in the European competitions with Norwegian club Rosenborg the role model. The club hired Norwegian manager Åge Hareide in 2000, who proclaimed a shift in line-up to a more attacking 4–3–3 system. With Hareide came a handful of Scandinavian players of whom especially Sweden national team player Mattias Jonson became a fan favourite. The year 2000 was also the year the club finalized a planned expansion of Brøndby Stadion from a 20,000 to a 29,000 capacity, making it the second largest stadium in Denmark, only trailing the Parken Stadium of F.C. Copenhagen. At the cost of 250 million DKK, the vast expenditure was seen as a sign that the club was out of its former financial crisis. The building project was finalized in Autumn 2000, and on 22 October, 28,416 spectators saw Brøndby beat Akademisk Boldklub 4–2 in the opening match of the rebuilt stadium. Hareide's visions of a 4–3–3 system never worked out, and the team soon returned to the well-known 4–4–2 setup. As he slowly lost hold of a ten-point lead to rivals F.C. Copenhagen, gained in a great first half of the 2001–02 Superliga season, Hareide took his leave in spring 2002 before the last matches of the season. He was replaced by youth team coach Tom Køhlert, who, though reluctant to take the job, gave first team debuts to the top youth team players, most notably Thomas Kahlenberg,