After having surrendered the T20I series on Friday, Australia were forced to make changes to their side for the final match on in Sydney.
Skipper Aaron Finch, who suffered a left hamstring injury, was replaced by in-form left-hander Usman Khawaja, while Shane Watson was named captain.
Finch suffered the injury while during his 74-run knock at the Melbourne Cricket Ground.
“It is hugely frustrating to suffer this injury. I am hoping it will not keep me out for a lengthy period of time, especially with an ICC World Twenty20 on the horizon, but I will be guided by the specialists,” said the explosive opener.
Watson’s appointment followed a recommendation by the National Selection Panel that was approved by Cricket Australia’s Board of Directors.
“It is an honour to be asked to lead the side on Sunday, although the circumstances are far from ideal. We may have lost the series but there is a great deal to play for with the ICC World Twenty20 coming up and you can be sure we will be determined to do well in Sydney,” Watson said.
Watson is Australia’s second most experienced T20I player with 51 caps, only David Warner (54) has appeared more often for Australia in the shortest form of the game.
Watson will become the ninth player to captain Australia in T20Is. He has previously captained Australia in one Test and nine One-Day Internationals in 2012 and 2013.
The 34 year-old all-rounder is Australia’s leading wicket-taker in the T20I format with 41 victims and his tally of 1191 runs is second only to Warner’s haul of 1465 for his country.