Johnson defends sledging

Mitchell Johnson has defended Australia's aggressive stance and warned England they face more punishment during the third Ashes Test in Perth.

Johnson has been tormentor-in-chief of England, taking 17 wickets to help his side establish a 2-0 series lead as they look to regain the famous urn.

Tension between the two teams has been evident, with Australia accused of going too far with their attempts to unsettle Alastair Cook's side with their use of sledging.

But Johnson has defended the practice, insisting it is all part of the game.

"That's fast bowling, isn't it?" said Johnson. "Throughout history, it's all about intimidating.

"If you can bowl a ball at someone's grille, I don't care who you are you're going to feel intimidated - and especially on a wicket like Perth.

"I like the idea that being a fast bowler - you can be aggressive and intimidate."

Johnson reserved some special words for Joe Root, having given him a hard time out in the middle during Australia's 218-run at the second test in Adelaide.

"It can go either way. You can either be a bit lippy or give a little smile here and there can make the batsman think," he added.

"Joe Root, we saw in Brisbane, came back with a few words and I thought I had cracked him there.

"Some people call it sledging, I just call it mind games.

"It's a cute little smile he's got. I didn't mind giving him one back as well."