Australia remain on track for a one-day series clean sweep against the West Indies after coasting to a five-wicket victory at the SCG.
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The tourists limped to 220 thanks largely to an unbeaten century from Kieron Pollard, and Australia's victory never looked in doubt as opener Shane Watson (76) top-scored to lay the platform for the chase.
Wicketkeeper Matthew Wade (13) and all-rounder Glenn Maxwell (one) were the unbeaten batsmen as the home side won with 31 balls to spare.
Watson, who smashed a century in the previous game in Canberra, produced another dominant innings which thrilled the Sydney crowd.
The 31-year-old looked set for back-to-back tons until he was undone by a wicked Tino Best delivery, which caught the edge through to wicketkeeper Devon Thomas.
Australia made a blistering start to their chase with Watson and Aaron Finch putting on 53 for the first wicket until the latter was trapped in front by Sunil Narine for 25.
The in-form Phillip Hughes (23) then shared a 63-run stand with Watson before he became Narine's second victim.
Hughes was out attempting a sweep shot, missing the ball completely before it caught his glove and flew to Dwayne Bravo at first slip.
Adam Voges (28), a late inclusion for the injured George Bailey, and Michael Clarke (37) both made strong contributions, with the skipper dismissed just before Australia reached their victory target.
Earlier, the West Indies made a dismal start to their innings, slumping to 55 for six inside the first 20 overs.
Top-order batsman Johnson Charles (nought), Kieran Powell (nine) and Darren Bravo (four) were all back in the pavilion inside eight overs as they fell victim to a firing Mitchell Johnson (three for 36).
Ben Cutting, playing just his second ODI, also caused havoc and finished with three for 45 as it looked like the tourists would be lucky to get to triple figures.
Cutting removed Narsingh Deonarine (10) and Thomas (seven) in successive overs, thanks to catches by Finch at second slip to leave the tourists reeling.
But a fighting knock from all-rounder Pollard, who finished unbeaten on 109, and spirited resistance from the West Indies' lower order got them to a competitive target.
Skipper Darren Sammy (25), and tail-enders Andre Russell (18) and Narine (23) all made valuable contributions to ensure the visitors got over 200.
Pollard blasted 11 fours and two sixes in his 136-ball knock but it was not enough to stave off defeat, and Sammy's men will now need to win the final game in Melbourne on Sunday to avoid an embarrassing 5-0 series whitewash.