It was to be a day of frustration for the defending Premier League champions.
Wolves had played well in a number of games without luck this season, but today they rode their luck - as well as playing out of their skin.
With so many key players missing, the Blues were far from their fluent best but still kept plugging away until Julian Alvarez levelled with a superb free-kick.
However, it was Wolves who grabbed the third goal of the game when Hee-chan - who many felt should have been dismissed for second bookable offence - prodded home from close range eight minutes later.
Watch the short highlights by playing the video above...