Milner hopes that the encouraging signs from his partnership with Johnson down the right can be a major factor in England's progression in the World Cup.
They formed a strong bond against Slovenia and Milner believes they can do the same against Germany which he says will be the biggest game of his life.
Milner said: "The more you play with a full back helps. You've got pairings all over the field, the centre-backs, the two in midfield and up front and another is the full-back and the winger.
"It's easier to play when you have somebody of Glen Johnson's quality behind you. He's a top player, fantastic going forward, talks to you all the time and overlaps and he is good defensively. He's a great player and to have him behind me means I know that he will be there for me.
"I think this will be the biggest game of my career. You are lucky to be playing in a World Cup for your country. Each game becomes the biggest one yet but now it's knock-out.
"The last game was a bit like knock-out but this is real knock-out football. England against Germany is a massive game, at whatever level it is, from under-16s to the full side. It's got a great history and great occasion about the match."