Javier Mascherano: "Sergio is someone I know well and for me is one of the five best strikers in the world.
"Given space he is the type of player who can destroy you so we have to ensure he doesn't get that space and doesn't feel comfortable.
"I think we are going to see Man City go all out to attack.
"That is the way they normally play and with the result they'll need to do that more than ever."