David Warner has sensationally declared he would backflip on his retirement and fill the void at the top of Australia’s Test batting order against India next month if called on.

In a bizarre interview, the 37-year-old — who retired from Test cricket last summer and is regarded as one of the nation’s greatest openers — said he would even play in New South Wales’ next Sheffield Shield match to prove he was still ready.

Warner, who denied his comments were tongue-in-cheek in any way, said he was just as prepared as any batter in the country.

“I’m always available, just got to pick up the phone,” he told News Corp on Tuesday.

“I’m always dead serious. Let’s be honest, the guys have played one red ball game (first round of the shield) since their last Test matches in February, so I’ve almost had the same preparation.

“Honestly, if they really needed myself for this series, I’m more than happy to play the next Shield game and go out there and play.

“I did retire for the right reasons to finish the game, and I wanted to finish. (But) my hand is up if they desperately need someone. I’m not going to shy away from that.”

Warner said he had even contacted men’s coach Andrew McDonald and chief selector George Bailey.

“I’ve cheekily messaged both. I’ve spoken to Torch (McDonald) and his answer back to me was; ‘you retired,’” he said.