The towering striker was one of the surprise inclusions in the Three Lions' squad for Euro 2012 after an unimpressive season with Liverpool, but justified his call-up with a goal against Sweden in the 3-2 Group D win on Friday.
"I’m over the moon for him. Obviously I’ve been working with him a while at Liverpool now, and he’s been getting some undeserved criticism," Johnson stated.
"It’s difficult when you go to a new club. It’s hard to settle in as it is, but obviously with a big price tag, people expected him to score goals straight away. It’s not always that easy, and I think the last couple of months playing at Liverpool he’s been one of our best players, hence why he got into the England squad.
|13/2||Andy Carroll is 13/2 to be the first goalscorer when England take on Ukraine|
"And as long as he keeps doing things like on Friday [against Sweden], I’m sure he’ll prove a lot of people wrong.
"The Sweden goal could be the start of something. Whenever he gets in positions, we’ve got Stevie [Gerrard] and other people who can deliver, and he’s going to petrify any centre-half, so I think he can go on and do well."
England take on Ukraine on Tuesday at 20:45CET in their last match of the group stage.