Australia v South Africa Cricket as David Warner hits double century before retiring with cramp while Anrich Nortje escapes injury

The camera, which is suspended on cables and provides aerial and close-up views of the action, felled Nortje after striking him in the back. He was quickly back on his feet, but admitted to having a sore elbow.

“I moved my head and then I saw the camera and I was a little bit too late. It was quite quick,” said Nortje, who added it did not affect his bowling.

“The one thing we’ve spoken about is how low it is. I don’t think it should be travelling head height.”

Warner injured while celebrating

Warner, who came into the second Test under some pressure after scoring only three runs in the series opener, resumed on 32 not out.

He edged steadily towards his hundred, sealing it by pulling Kagiso Rabada to the fine leg fence and celebrated with a leap into the air as the fans at the Melbourne Cricket Ground crowd rose to applaud him.

Warner first needed treatment for cramp half an hour before tea, when he was on 124.

After he completed his double century, by edging for four past second slip off Lungi Ngidi, he was given another standing ovation and slumped to his knees, pumping his arms in the air with a roar.

He got to his feet to leap in the air again but suffered cramp in his left leg as he landed, and was left propping himself up with his bat before being helped from the field, although he could return to the crease on day three if he is fit enough to bat.

The 254-ball knock included 16 fours as well as two sixes off Keshav Maharaj. It was his third double century, his 25th hundred and his first ton in nearly three years.

His only moment of poor judgement came before lunch when he ran out batting partner Marnus Labuschagne for 14 while trying to get another run from an overthrow.

Warner departed with his side on 329-3 and they reached the close with Travis Head on 48 not out and Alex Carey unbeaten on nine.

However, they were given an injury worry when all-rounder Cameron Green, who took five wickets on day one, also had to retire hurt after being hit on his right index finger by a short Nortje delivery.

But the day belonged to Warner who earlier this month withdrew his appeal to lift his lifetime leadership ban in Australian cricket which he received for his part in the infamous ball-tampering scandal.

“For him to be able to do it while his back is against the wall means even more,” Warner’s wife Candice told Fox Cricket.

“You’d think by now writing David off is probably the wrong thing to do. He thrives on that.”

Australia lead the three-match series 1-0 after a six-wicket win in the first Test in Brisbane.