Betting on Champions League
Odds on Champions League are very common because it is the world's biggest club tournament and many of those who like to bet online have probably tried playing on Champions League.
International tournaments are a place where teams from different countries meet and that's why differences between teams can be bigger than in other leagues. Remember that it is often hard for teams from smaller leagues to compare to teams from La liga, Premier League and Serie A. The difference is most obvious on the away ground.