Speaking on CBS Sports, Carragher said: "It was like two completely different games of football. The first half felt like a testimonial and second half felt like one of the best halves of football we've seen in the Champions League group stage. As soon as PSG made the substitutions, brought Dembele on especially, it felt like... Thierry mentioned before the game it felt a bit strange the team Luis Enrique had started with.
"It felt like their best team was on at the end, and Manchester City, as we know from the Premier League and at times in this Champions League group stage, they can't cope when the intensity of a game is too much for them, the physicality.
"They got absolutely bullied in that second half and it was men against boys. They were lucky it was only four in the end. It could have been worse."