Eighteen clubs, 34 matchdays and a relegation play-off that pits the Bundesliga's 16th-placed side against the third team in 2. Bundesliga. German football packs a lot of betting interest into a season that starts in August and finishes in May. Supporters of Bayern, Dortmund or Leverkusen follow those fixtures from London, Dubai and New York, and each country sets its own betting rules.