SYDNEY — Opener Shane Watson top-scored with 76 as Australia continued to dominate West Indies during a convincing five-wicket victory in the fourth One-Day International at the Sydney Cricket Ground Friday. Kieron Pollard earlier hit a defiant unbeaten century to haul West Indies almost single-handedly to 220 all out but it never looked like being enough and the host took a 4-0 lead in the five-match series with 31 balls to spare. Watson scored a century on his return from injury as Australia wrapped up the series Wednesday but his innings was not as assured Friday and he had a couple of lives before departing, caught behind off the bowling of Tino Best. Paceman Best returned later to dismiss Australia skipper Michael Clarke (37) in similar circumstances with the scores level, which left Glenn Maxwell to push the winning run through the covers. Left-arm paceman Mitchell Johnson (3-36) ripped through the West Indies' top order on a bright, sunny day at the SCG and for a while it looked like Australia might crush the visitors. One-day specialist Pollard, though, fought a one-man rearguard action with a brilliant but controlled innings of 109 not out to ensure there would be no repeat of the dismal 70-run effort with which West Indies opened the series in Perth. Sunil Narine (23) offered some support in a 64-run partnership for the ninth wicket before Pollard recorded his third one-day century, reaching 99 with his second six and taking a single off the next ball. Pollard's first six after he had hit 11 fours flew into the stands at long-on, hitting an inattentive security guard full on the head. He was left without a partner when Best was run out with two balls remaining in the 50 overs. Australia will try to secure a series sweep in the final match at the Melbourne Cricket Ground Sunday. Aussie T20 squad Australia Friday made five changes for next week's one-off Twenty20 international against the West Indies in Brisbane. Selectors were forced to bring in new players with five T20 team regulars in India preparing for Australia's four-Test series. Squad: George Bailey (captain), Nathan Coulter-Nile, Ben Cutting, James Faulkner, Aaron Finch, Brad Haddin, Josh Hazlewood, Ben Laughlin, Clint McKay, Shaun Marsh, Ben Rohrer, Adam Voges. — Agencies West Indies Powell c Maxwell b Johnson 09 Charles b Johnson 00 DM Bravo c Finch b Johnson 04 DJ Bravo lbw b Maxwell 03 Pollard not out 109 Deonarine c Finch b Cutting 10 Thomas c Finch b Cutting 07 Sammy c Clarke b Cutting 25 Russell c Maxwell b Faulkner 18 Narine c Wade b McKay 23 Best run out 01 Extras (b-1, lb-1, w-9) 11 Total (all out, 49.4 overs) 220 Falls: 1-5, 2-17, 3-17, 4-22, 5-45, 6-55, 7-98, 8-133, 9-197. Bowling: McKay 10-2-41-1, Johnson 10-1-36-3 (w-4), Maxwell 10-0-34-1 (w-1), Cutting 10-1-45-3 (w-1), Faulkner 9.4-1-62-1 (w-3) Australia Watson c Thomas b Best 76 Finch lbw b Narine 25 Hughes c DJ Bravo b Narine 23 Clarke c Thomas b Best 37 Voges c Sammy b Russell 28 Wade not out 13 Maxwell not out 01 Extras (lb-8, w-8, nb-2) 18 Total (for 5, 44.5 overs) 221 Did not bat: J. Faulkner, M. Johnson, B. Cutting, C. McKay. Falls: 1-53, 2-115, 3-145, 4-198, 5-220. Bowling: Best 9.5-0-38-2 (w-3), Russell 6-0-40-1 (nb-2, w-1), Sammy 2-0-16-0 (w-1), Narine 10-1-34-2, DJ Bravo 4-0-25-0 (w-1), Deonarine 8-0-38-0, Pollard 5-0-22-0 (w-2).