He told liverpoolfc.tv: "Raul has got more of a free role now and he scored another great goal. That's three goals in four games now so the longer he keeps that up the better."
Johnson played in a new position himself during the victory over Tony Pulis's side and he did an excellent job for the team at left wing-back.
He said: "I enjoyed it. I'm pleased to play anywhere so I will try and do a good job whatever position I play."