Speaking on Sky Sports, Keane said: "It's not easy winning football trophies. Fernandes has had great praise for the last few months and people have been comparing him to [Eric] Cantona etc. Fernandes didn't really do much tonight.
"The top players turn up in the big occasions. And that's what the Cantona's used to do – they get their hands on trophies. That's where this team are a little bit short.
"They probably need one or two more players to come into this squad, no doubt, and they need the mentality and confidence of winning a semi-final to get them over the line.
"You then get momentum and they just didn't quite have it tonight.
"But credit to City – they were up against an outstanding Man City team tonight who turned up and put on a good show."