On 5 August 2005, Bayern Munich hosted the first competitive match at the new Allianz Arena, beating Borussia Mönchengladbach 3-0.
Built with a capacity of 66,000 (and later expanded to 69,000) the Arena replaced the Olympic Stadium as home to both Bayern and 1860 Munich, and also serves the German national team. In recognition of its multiple tenants, it includes an exterior surface that changes color based on the team playing--red for Bayern, blue for 1860 Munich, and white for the national team.
Construction began in 2002 and the stadium officially opened on 30 May 2005 with an exhibition between 1860 Munich and Nuremberg. Bayern and the German national team faced each other there in a friendly the following day.
In that first competitive match, a Bundesliga contest, Bayern midfielder Owen Hargreaves scored the opening goal, curling a right-footed shot into the far top corner from just inside the box in the 28th minute. His teammate, striker Roy Makaay, doubled, then tripled, the lead with goals in the 86th and 89th minutes.
It was the start of an excellent year for the hosts, who went on to win the double that season, taking both the league title and the German Cup.