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.

Alexander Baumjohann is a German footballer most recently played for Sydney FC as an attacking midfielder. After developing as a star junior with Schalke 04, he moved to Borussia Mönchengladbach and enjoyed great success with the Bundesliga club, earning a move to Bayern Munich in 2009.