Ajax skipper Siem De Jong put the visitors 2-0 up before goals from Yaya Touré and Sergio Aguero restored parity, but the Argentine was denied a dramatic winner by the officials.
Meanwhile, Arsenal let a 2-0 lead surrender as Schalke cancelled out first-half strikes from Theo Walcott and Olivier Giroud to secure a point.
Here is the best of the reaction from the professionals on Twitter.
West Brom midfielder Steven Reid (@stevenreid12) is impressed by De Jong’s first goal: “Tidy finish that #DeJong
Former Newcastle defender Warren Barton (@warrenbarton2) is not impressed with City’s marking for Ajax’s second goal: “Zonal making again…!!”
Ex-Arsenal midfielder Ray Parlour (@RealRomfordPele) is delighted by his former side’s start in Germany: “Yeeeesss. Walcott gets Giroud off the Hook!….2-0 Giroud! Great Goal. Fantastic cross from Lukas Poldoski. Don’t write the Gunners off! #getin”
Celebrity Arsenal fan Piers Morgan (@piersmorgan) is in agreement: “BOOOOOOM! That’s why Walcott should start, and that’s why he should play down the middle. He’s a great finisher. #Arsenal”
Former Liverpool striker Stan Collymore (@StanCollymore) believes Walcott should be played in a central role more often: “My name is Theo. I’m a striker.”
Liverpool defender Jon Flanagan (@jon_flan93) likes Touré’s leveller: “Great goal by Yaya Touré!”
And Flanagan’s senior team-mate Glen Johnson (@glen_johnson) is also impressed: “What a goal that was…..”
Former Ipswich Town midfielder Matt Holland (@mattholland8) wants Sergio Aguero to change his footwear after another slip: “Aguero is a fantastic player but if he isn’t wearing studs tonight…!!! #slippingallovertheplace”
But the Argentine scores, and England legend Gary Lineker (@GaryLineker) hails the strike: “Stunning finish from Aguero. If City can turn this around and Dortmund hang on to their lead, what a game Man City v Real Madrid will be!”
Former Wimbledon striker Jason Euell (@jasoneuell) is frustrated by a wayward Walcott effort: “Theo swing your left foot at it…. Arghhhhh!”
Former Northern Ireland international Jim Magilton (@magilton7) is exasperated as City are denied a penalty: “What is the point of having an official on the bye line if he doesn’t make any decisions? Balotelli penalty all day long and he has the best view!”
Ex-Liverpool striker Robbie Fowler (@Robbie9Fowler) backs up Magilton: “What is the point of those assistants/linesmen near the goal….”
Manchester United defender Rio Ferdinand (@rioferdy5) enjoyed the City match: “Good night of football, watched it with the lads and coaching staff…finished City 2-2 Ajax. Surprising but good point for Ajax.”
Finally, jockey AP McCoy (@AP_McCoy) is frustrated to see Arsenal let a lead slip: “Happy Arsenal got a point in the end but still disappointed that they couldn’t hold on to a two goal lead!”
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