Aaron Finch hit a career-best ODI score of 155 to help Australia to an eight-wicket win over Pakistan in Sharjah.
Finch's second successive hundred in the series saw the visitors take a 2-0 lead, having also won by eight wickets at the same venue on Friday.
Australia successfully chased down 281 on that occasion, while the target on Sunday was slightly higher after Pakistan finished with 284 for seven from their 50 overs with Mohammad Rizwan (115) their top scorer.
Finch and Usman Khawaja (88) put on 209 for the opening wicket, before Khawaja was caught at deep midwicket off the bowling of Yasir Shah in the 37th over.
Glenn Maxwell (19) was run out shortly afterwards but Finch continued to get runs and reached his 150 before clinching victory with 13 balls remaining.
Another victory in Abu Dhabi on Wednesday would see Australia take an unassailable lead in the five-match series.
