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.
Al Hilal has shown that the quality of players playing for Saudi Pro League clubs can compete with the world's biggest clubs. They may have lost the Saudi Pro League trophy last season to Al Ittihad, but they will certainly fight for it next season. The Saudi Pro League has become even more attractive with the arrival of many top European players, attracting more international attention, and their representative performance at the Club World Cup was not bad.