Stefan has done exceptionally well you just need to look at the league game at Spurs earlier this month to see how important he has been," Corrigan told City's website.
It's easy to brush over the fact that coming on as a sub in a game as important as that one at Tottenham, it's so, so difficult.
You've got to build your concentration into the pace of the game, which is already in full flow and it's so difficult and he's been exceptional in that respect.
And he made those three absolutely exceptional saves in a short space of time which were vital.
We knew his ability as he's done it in the past and been so good ever since he joined the Club.
But I think this season, where's he had to come one four times as a substitute, in the league he's been absolutely exceptional.
In the league I also think back to the game at Liverpool where Ederson also picked up an injury. Stefan came on and made a number of really vital saves there too in another huge game.
To come on and play like that in such a difficult part of the season when you've got a team like Arsenal breathing down your neck and they're firing on all cylinders says everything about him I think.
And when he's come in as a number one pick, like in the FA Cup, he's also done really well as well. So you've got to give the man huge credit."