Chelsea was not just lucky they deserved what they achieved since they started very well from the day 1 of the club world cup competition, getting to the finals they proved himself and right and proved everyone who never believed that they could lift the trophy wrong. Enzo Maresca has proven himself in the competition and for next season every team needs to be ready because the league is going to be more competitive.
After witnessing Chelsea performance in reaching the final, it is indeed not impossible to defeat PSG, and Chelsea has proven this, completely dispelling all doubts among the fans with a decisive blow. No one expected this match to turn into a rout; personally, i also thought it might be a closely contested game ending with a narrow score.
Next season will be a challenging one for every team, as competition will intensify. All clubs will need to improve their playing style if they want to compete with others.