Manchester City needed just one more win to secure their third Premier League title in four seasons, but they will have to wait another matchweek before aiming to confirm their success.
This is because Thomas Tuchel got the better of Pep Guardiola for the second time in under four weeks as Chelsea enjoyed a remarkable turn-around courtesy of a last-gasp winner from an unlikely source in defender Marcos Alonso.
The full-back's scuffed effort got the better of City shot-stopper Ederson to ensure Chelsea travelled back to London with all three points, but not without some trademark VAR/refereeing controversy.
With the scores level at 1-1, Raheem Sterling appeared to be obstructed by Chelsea centre-back Kurt Zouma, preventing Sterling from getting a shot off after a tangle of legs.
The England international fell to the floor, sparking wild protests from both the City players and Pep Guardiola in the dug-out.
The incident was reportedly looked at by VAR, but Anthony Taylor was deemed correct in his decision to allow play to continue.
Speaking to Sky Sports after the game, Sterling expressed his disappointment at both the result and the decision.
Sterling said: "It’s a difficult one to take, especially as we had chances to finish the game off and we didn’t finish it off. We got punished, as simple as that."
Specifically on the penalty controversy, Sterling explained: "For me, I couldn’t get a shot off because he’s put his knee in the back of my hamstring.
"I don’t know how it’s not a penalty, I don’t know how it’s not been reviewed properly. The ref said it’d been reviewed, but at the end of the day, personally, I knew it was a penalty.
"I thought the VAR was here to help, but it wasn’t meant to be. He said to me it’s been checked and it’s been cleared, it’s not a penalty, but for me it’s a sure penalty."
Pep Guardiola echoed his player's sentiments, claiming: "It’s a penalty. That’s all. It’s happens, it’s football. We will try next time to score our penalty. That's all I can say. I saw on the TV it was a penalty."
