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.
2001–02 Valencia CF season Valencia CF won their first La Liga title for more than 30 years, in the first season under new coach Rafael Benítez. The Tenerife recruit had a tough start to his job, with several dropped points and a midfield slot in the beginning of the season, culminating in a disqualification from Copa del Rey for fielding too many non-EU players. Benítez was reported to be near the sack before an away game against Espanyol. With Valencia trailing 2-0 at halftime, the resurgence of the team in the second half allowed the inexperienced coach to keep the job, and it got to be a starting point for a winning streak that eventually saw Valencia claiming the entire league, despite taking only 75 points and scoring a mere 51 goals.