I agree, Al Hilal were fortunate to beat Manchester City, although they were surprisingly defeated by Fluminense. Chelsea success in winning the Club World Cup was the culmination of all the surprises, defeating PSG, the much fancied Champions League holders. Admittedly, football is full of surprises, there's no guarantee that the favored team will finish the match as predicted.
Saying they were fortunate to beat Manchester city sounded like some sort of luck meanwhile in the actual sense they did earned it, their performance in the game was classic and deserving of the win, the surprise I see for me here is in their defeat against Fluminense, after they won Manchester City, ordinarily it was excepted of them that they were going to have their confidence boosted and they will be in a very food position to typically win a game like that without seeing it as really challenging but how they lost and got kicked out against a smaller team as compared to the one they won much before made it somehow surprising but then that is football.