When did Bayern Munich win their first competitive game under Barcelona's former manager?
2009–10 FC Bayern Munich season The 2009–10 season of Bayern Munich began on 1 July with their first training session, led by the team's new head coach Louis van Gaal. After several friendlies the first competitive game was a cup game on 1 August. The league started on 8 August.
1992 European Cup Final The 1992 European Cup Final was a football match held on 20 May 1992 at Wembley Stadium, London, between Sampdoria of Italy and Barcelona of Spain. Barcelona won the game 1–0 after extra time, thanks to a Ronald Koeman free kick, to record their first triumph in the competition. It was the first to have a group stage involving the eight second-round winners split into two groups, and the winner of each one met in the final. In doing so, they became the second Spanish club to win the tournament and the 19th overall.