Fernandinho says Manchester City boss Manuel Pellegrini has everyone on their toes.
Fernandinho believes Hart's embarrassment and axing is a warning that nobody can take their place for granted.
He said: "The manager picks the goalkeeper he thinks is best for each game, like he does with the other players.
"The manager supported Joe. We will all support him because when we lose, all the team loses, the same when we win.
"With the quality we have in our squad, everyone knows how hard they have to work. We all know we have good cover in our positions. It's the same for every player."
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