Have you checked today's odds? I would be surprised to see the odds for PSG increase to 1.76 even though yesterday I remember clearly the odds were around 1.62 (Stake.com) so is this a sign? We know that odds can change at any time depending on the total bets placed meaning in the last 12 hours most of the bets were placed on Chelsea side well, that makes me wonder whether these bets are made by regular gamblers or the mafia. To be honest, everyone's confidence in PSG has decreased a bit 
I will monitor the odds over the next few hours before placing any new bets, at least until the match gets closer to its scheduled time. if the odds for PSG continue to rise until reach 2.00 then I will cancel my previous bet on 1x2 market.
I am pretty sure they change it based on the betting people make. Which means that plenty of people decided to bet on Chelsea to win, and that does make sense in a small sense because while it is very difficult for Chelsea to win, the odds were like 1 to 5, so people of course decided to take that change and throw in some small money. I will monitor the odds over the next few hours before placing any new bets, at least until the match gets closer to its scheduled time. if the odds for PSG continue to rise until reach 2.00 then I will cancel my previous bet on 1x2 market.
But when the whole world does that, the "small" money becomes a lot bigger and that is why you do not get the results you want at all times. What we need here is to see people betting back on PSG if we want that odds changing, but doubt anyone really wants to, I doubt that is the case and we are going to probably end up with a result that would be very different for everyone else without a doubt.