I hope you learnt something important from that match, take note that no team should be underrated regardless of the odds the bookies give and also in the football world anything is possible, if Leicester would come out of relegation and win the EPL league then nobody should be suprised as how Chelsea beat PSG, that's football for you.
Well, I don't blame those who believed in PSG and better in them, PSG were in a crazy form and so the majority of football lovers apart from hard-core Chelsea fans would definitely believe in them more than Chelsea. Anyways their performance was top notch Chelsea really deserves the trophy, I don't care whether anyone thinks otherwise.
Well, sometimes the odds displayed by bookmakers aren't always reliable. I even remember the last World Cup, when Argentina faced Saudi Arabia. I remember there was a huge difference in odds between Saudi Arabia and Argentina. Many people were definitely betting on Argentina. And I remember Saudi Arabia winning. I could hardly believe it at the time. And now, what happened with Chelsea vs. PSG is almost the same. And I think those who bet on Chelsea were really lucky.
In football, no team can be underestimated. Because sometimes, big teams lose, not to big teams anymore, but to smaller, underdogs. And yesterday, the team considered the strongest, PSG, was actually defeated by a team considered less powerful, Chelsea. And yes, that's a common occurrence in football. But we're always surprised.