Roberto Mancini's failure to control Manchester City striker Mario Balotelli has cost them a tilt at the Premier League title, according to Jamie Redknapp.
The forward was sent off at the Emirates stadium after another erratic display as City dropped crucial points in the title race against Arsenal.
Mikael Atreta's strike sealed the points for Arsenal but it was Balotelli who grabbed the headlines again after he was eventually shown a second yellow card for a lunge on Bacary Sagna, having escaped a red card for a knee-high tackle on Alex Song.
Redknapp told Super Sunday that it would have been a "travesty" if Arsenal had failed to win the match and was bewildered by the lack of desire shown by many of City's player - primarily Balotelli.
"They had a lot of passengers today," Redknapp told Super Sunday. "Gareth Barry and (David) Pizzaro were trying to work hard but they were carrying people like Aguero and Balotelli. Every time they didn't have the ball there was no attempt to get the ball back. Nasri was the same.
"Look at Manchester United and the way they defend to a man. I looked at Manchester City today and it looked like they had almost given up on the title today - and that is so disappointing.
"You could see every time something happened with Balotelli, the players look at him and think, 'why are you still on the pitch? 'At half-time I said he (Roberto Mancini) had to make the substitution. He had to take him off.
"And in the end that has been Mancini's downfall because he is completely blinded by him, and at the moment he is derailing everything good about Manchester City."
Niall Quinn added: "We have been very critical today of Balotelli because the stakes were so high.
"There was a time in the second half when I thought he was going to get in the game. He had an overhead kick from five yards, which if he made contact with he would have been a hero.
"But today we saw too much of the wrong stuff today from Balotelli."