It was a penalty to potentially seal the Premier League title... but has Sergio Aguero's missed Panenka helped give Chelsea a Champions League boost?
This was supposed to be a fitting finale, Aguero scoring the goal that seals Manchester City their fifth Premier League crown, just like he did for their first.
But the Argentine's first-half miss, chipping the ball into the air and watching Chelsea goalkeeper Edouard Mendy catch it one handed, allowed Chelsea a route back into the game.
It remains a case of when, not if, Pep Guardiola's side win the league, with their lead still 13 points after a 2-1 defeat by Chelsea at Etihad Stadium.