I think most right backs would have looked in trouble on Sunday, Montero was having one of those games. When you're up against a quick, tricky winger who is on fire then even the best can look clumsy and slow.
Reminded me of Clichy in the Wigan cup final where he was up against McManaman and everybody then decided that he was shit because of that one game. Or Maicon against Bale where he went from one of the best right backs in the world to an overrated fraud based on one game.
People are fickle.