Question: Who was the football star born in 1974 that left Bayer Leverkusen to join another club, after the club did not win the Champions League and domestic league in 2001-02?

Context articles: Bayer 04 Leverkusen (women)
Zé Roberto
Bayer 04 Leverkusen
2001–02 Manchester United F.C. season
2001–02 UEFA Champions League
Bayer Giants Leverkusen
2001–02 Bayer 04 Leverkusen season
2017–18 Bayer 04 Leverkusen season
2016–17 PFC CSKA Moscow season
2002 UEFA Champions League Final

Bayer 04 Leverkusen, also known as Bayer Leverkusen, Leverkusen, or simply known as Bayer, is a German women's football club based in Leverkusen, North Rhine-Westphalia.
 The club plays in the 2.
 Bundesliga, the second tier of German women's football.
José Roberto da Silva Júnior (born 6 July 1974), commonly known as Zé Roberto, is a Brazilian professional footballer who plays for Palmeiras as a left wing back or as a midfielder.
Bayer 04 Leverkusen Fußball GmbH, also known as Bayer 04 Leverkusen ] , Bayer Leverkusen, Leverkusen or simply Bayer, is a German football club based in Leverkusen, North Rhine-Westphalia.
 The club plays in the Bundesliga, the top tier of the German football league system, and hosts matches at the BayArena.
The 2001–02 season was Manchester United's tenth season in the Premier League and their 27th consecutive season in the top division of English football.
 The second full season of the new millennium was rather dismal for the Red Devils in comparison to the previous three years.
 The club finished in third place in the Premier League, their lowest finish in the history of the Premier League, and they were knocked out of the FA Cup in the fourth round.
 League Cup success was not expected, and the club duly obliged by playing what was effectively a reserve team against a strong Arsenal side in the third round.
 United's best success in the 2001–02 season came in the UEFA Champions League, in which they reached the semi-finals before being knocked out by Bayer Leverkusen on away goals.
 Ultimately, United's failure to win anything boiled down a dismal run of form in November and early December when they suffered five defeats in seven league games, including three defeats in a row against Arsenal, Chelsea and West Ham United in December.
 They also lost six home games in the Premier League, their worst home record since the 1977–78 season.
 They only lost three more league games all season, but that terrible form earlier in the campaign counted against United for the rest of the campaign and they finished 10 points behind champions Arsenal (who sealed their crown by beating United 1–0 at Old Trafford in the penultimate game of the season) and three points behind runners-up Liverpool.
The 2001–02 UEFA Champions League was the 47th season of the UEFA Champions League, UEFA's premier club football tournament, and the 10th since its rebranding from the "European Champion Clubs' Cup" or "European Cup".
 The tournament was won by Real Madrid, who beat Bayer Leverkusen in the final to claim their ninth European Cup title.
 The final's winning goal was scored by Zinedine Zidane, with a left-footed volley from the edge of the penalty area.
Bayer Giants Leverkusen is a professional basketball club, part of the Bayer Leverkusen sports club based in Leverkusen, Germany.
 It currently plays in ProA, German second league.
Bayer Leverkusen became the second club to finish runner-up in both the Champions League and domestic league and cup competitions in the same season after Barcelona in 1986, with a potential treble unravelling in the final couple of weeks of the season, resulting in no trophies won at all, plus the defections of stars Michael Ballack and Zé Roberto to Bayern Munich.
 It dominated the second half of the Champions League final against Real Madrid, but lost 2–1 due to a volley from Zinedine Zidane in the latter stages of the first interval.
The 2017–18 Bayer 04 Leverkusen season is the 114th season in the football club's history and 39th consecutive and overall season in the top flight of German football, the Bundesliga, having been promoted from the 2.
 Bundesliga Nord in 1979.
 In addition to the domestic league, Bayer Leverkusen also are participating in this season's edition of the domestic cup, the DFB-Pokal.
 This is the 60th season for Leverkusen in the BayArena, located in Leverkusen, North Rhine-Westphalia, Germany.
 The season covers a period from 1 July 2017 to 30 June 2018.
The 2016–17 CSKA season was the 25th successive season that the club played in the Russian Premier League, the highest tier of association football in Russia.
 CSKA were defending Russian Premier League champions, and as a result will enter the Champions League at the Groups stage, and also take part in the Russian Cup.
 They finished the season in second place, behind Spartak Moscow, were knocked out of the Russian Cup by Yenisey Krasnoyarsk and finished fourth in their Champions League group that contained AS Monaco, Bayer Leverkusen and Tottenham Hotspur.
The 2002 UEFA Champions League Final was the final match of the 2001–02 UEFA Champions League, Europe's primary club football competition.
 The show-piece event was contested between Bayer Leverkusen of Germany and Real Madrid of Spain at Hampden Park in Glasgow, Scotland on Wednesday, 15 May 2002, to decide the winner of the Champions League.
 Leverkusen appeared in the final for the first time, whereas Real Madrid appeared in their 12th final.