David Warner

Warner returned to Australia's World Cup camp on Thursday (NZ time) ready to begin his preparations for the Proteas on Sunday.

The left-hander was the only player missing from the optional training session at Old Trafford, as he travelled from London to Manchester after the birth of his third daughter.

However, he wont miss any games as Australia enter the business end of their title defence.

And if his dominating form at the World Cup wasn't sign enough he'll be ready to go, Warner's history is.

Warner, transformed from the man who struggled in Sunday's defeat by India, busied his way to 107.

With captain Aaron Finch also clubbing 82, Australia should have posted more than their 307 all out, only to lose their last six wickets for 30 runs thanks mainly to Mohammad Amir's 5-30.

Facing a more reachable target than they would have once feared, Pakistan were well placed at 136-2 when their own collapse of 4-24 sucked the life from the chase.

Warner, Australia captain Steve Smith and batsman Cameron Bancroft were punished for the roles they played in the plot to alter the condition of the ball in the Cape Town Test against South Africa in March, with Warner and Smith suspended for a year and Bancroft for nine months.

With tears rolling down his face, Warner apologised for his part in the cheating and vowed to earn the public's respect again.

He said he now understood that he needed to make changes in his life, and he would be seeking help with that.

An inquiry by Cricket Australia found that Warner came up with the plan to tamper with the ball and then instructed a junior player, Cameron Bancroft, in how he went about it.

Warner said he took full responsibility for his actions, but refused to answer questions about whether other players were involved.

The ball-tampering episode involving Steve Smith, David Warner and Cameron Bancroft has left reputations in tatters and angered and disappointed politicians, fans and former players alike.

Smith, who before the weekend was one of his country's most revered sportsmen, and Warner have both received 12-month bans by Cricket Australia Wednesday for their part in illegal tampering with the ball on day three of the third Test against South Africa.

Warner became just the fifth batsman to achieve the feat and the first on Australian soil as he clocked up 100 runs off just 78 balls in the first session in Sydney.

Wahab finally dismissed the Australia opener on 113 when he drew an outside edge that flew to wicketkeeper Sarfraz Ahmed.

However, the Pakistan paceman said Warner, who also claimed a ton in the Boxing Day Test, had already done the damage.

"Everybody knows Warner is an attacking player and we know where he is strong," said Wahab.

Warner was man of the match for his 109 from 120 balls, his sixth one-day international hundred, which moved Australia to the top of the three-team table.

But he took a blow to his left index finger while fielding and an X-ray has revealed a fracture.