The Citizens looked to be heading towards a 1-0 win before the Foxes earned a 96th-minute penalty, converted by Jamie Vardy, to force extra-time during Tuesday’s quarter-final clash at King Power Stadium.
However, there would be no turn-around for Leicester as City held off their opponents during the additional 30 minutes before clinching their place in the semi-finals with a 4-3 penalty shootout win.
"I am so happy. Especially when the situation is bad, it's how you react," he told Sky Sports.
"There were no complaints in extra time to say how unfair it was in the last minute. Instead of that, they tried again and tried again for the penalties as well.
"Sometimes in football, these kinds of things happen and the way we react it not easy, you are tired and there are a lot of young, young players who played added time.
"The way we played in extra time, we tried to win the game but it is not easy because Jamie Vardy is there and Riyad Mahrez so it is always complicated.
"The TV doesn't lie so we will see if it was penalty or not but what I liked the most is how we reacted and overcame that situation. That is a good sign for our future."