Match scorecard

Watson's 126 came off 122 balls

Shane Watson's maiden international century helped Australia secure a seven-wicket win over West Indies in the third one-day international.

Watson (126) and Ricky Ponting (69) put on a 190-run stand as the tourists reached 227 for three in 40.3 overs.

West Indies had set their total of 223 inside 48 overs, with a Chris Gayle half-century the only innings of note.

The victory at Grenada's National Stadium gives Australia an unassailable 3-0 lead in the five-match series.

Gayle, who hit 53 from 54 balls, was by far the hosts' best player, although he received some support from Xavier Marshall (35), Ramnaresh Sarwan (31) and Shivnarine Chanderpaul (32).

Nathan Bracken (3-26) finished with the best figures of the Australia bowlers, while Brett Lee claimed his 300th one-day wicket as he caught and bowled Darren Sammy for three.

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But the hosts never looked like claiming victory and were guilty of a number of dropped catches and misfields.

On a slow pitch, all-rounder Watson and captain Ponting punished that sloppiness by posting the biggest limited overs second-wicket partnership by an Australian pair in the Caribbean.

Watson, who was called into the squad as a late replacement for the injured Matthew Hayden, started patiently but then accelerated to hit 126 from 122 balls before he was caught by Sarwan off the bowling of Sammy.

Three overs before, Ponting had been removed by Gayle, but by then the duo had paved the way for victory and Clarke and Symonds guided Australia home.

POST-MATCH REACTION

Australia all-rounder Shane Watson: "I'm just really enjoying my time back in the Australian team. A year or so ago, things weren't looking that great but to be able to come out and get through some games and perform with the bat especially is a lot of fun."

West Indies captain Chris Gayle: "I thought myself and Xavier really started well - the wicket was doing a bit early up - but the middle order was a disaster for us again. We can't continue like this, the outfield cricket doesn't look good as well, we really need to pull our socks up."