That gave Arsenal the motivation to go after an equaliser which came via Theo Walcott in the 70th minute before Danny Welbeck returned to head home in the fifth minute of stoppage time, giving the Gunners a last-gasp triumph.
"Forget the last-minute goal, Leicester played like champions there, I felt," said Carragher on Sky Sports.
"They've come to the Emirates, deservedly gone 1-0 in front, then down to 10 men. How long was it before Arsenal had a shot on target?
"The way they threw their bodies in front of everything, the way they defended. They did perform like champions and they've been very unfortunate there."