Adam Zampa admitted a depleted Australia face a "difficult challenge" in the one-day international series against Pakistan starting on Tuesday. Australia won the three-match Test series 1-0 after securing a well earned 115-run victory in the third match in Lahore on Friday. But they will miss regulars like David Warner, Pat Cummins, Josh Hazlewood, Mitchell Starc and Glenn Maxwell -- all not in the squad for multiple reasons -- in the one-day series. To add to their woes, senior batsman Steve Smith was also ruled out of the limited-overs series with a recurrence of an elbow injury. But Zampa believes it's an opportunity to build the squad.