Pakistan won the toss and batted but was all out for 213 in the last over, with recalled paceman Josh Hazlewood taking 4-35 for Australia.The Australians lost opener Aaron Finch (2) with the total on 15 and withstood a torrid spell from Wahab Riaz (2-54) in the middle of the chase.
Riaz was unlucky to have two catches put down, including Watson on 4. Watson shared an 89-run stand with Steve Smith (65) and unbeaten 68-run stand with Glenn Maxwell (44 not out). Watson hit a boundary to get Australia to 216-4 in the 34th over.
Australia will play defending champion India in a semifinal at Sydney on Thursday.
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