There is actually no certainty with this, Chelsea and Real Madrid are two different team of which if we are to even make comparison, Real Madrid has got a better team quality with the kind of players they have, so saying Chelsea will not perform as worse as Madrid will only mean you are a Chelsea fan and it is just your way of expressing support. Anyways I still wish them the best and just for the sake of the football aesthetics that comes with different teams having to win and not a particular team carting away everthing and giving off some boring feel to the game, I would lovento see Chelsea win else Paris Saint-Germain remains the favourite for this finals.
Real Madrid is undoubtedly stronger than Chelsea. There is no doubt about it. However, it is not right to think that chelsea will lose by a big margin against PSG because of this. We can consider PSG as the favorite . But I will not say that chelsea has no chance of winning at all. Chelsea is also a strong team.
Football is always unpredictable. We have seen that PSG won 4- 0 against Atletico Madrid and Real Madrid in the FIFA Club World Cup. They won 2-0 against Bayern Munich. Again, this team lost 1-0 against a small team like Botafogo.
There is no doubt that Chelsea will give their full effort to win the fifa club world cup. However , if PSG can play well against chelsea's defense, then they have a chance of winning. Although Chelsea's attack is not very strong, the team's defense is strong. Chelsea will play defensively against PSG. So it's going to be difficult for PSG to score in this match.