Gros Islet (St. Lucia): With their five-match One-day International series tantalizingly locked at 1-1 following a pulsating tie in the third game, the West Indies and Australia will clash again here Friday, chasing a victory that will hand either side a huge advantage ahead of Sunday's finale.

Both squads were upbeat after practice sessions at the lush Beausejour Cricket Ground Thursday, remaining focussed on a victory that would ensure them the crucial lead in a series that has been an ultra competitive affair.

The West Indies lost the opening match last Friday by 64 runs but hit back well last Sunday to carve out a five-wicket triumph.

Tuesday's third ODI at Arnos Vale produced a tie after the Windies fought back form a near hopeless position.

They have been strengthened by the inclusion of Trinidadian opener Adrian Barath who has replaced the out-of-form Kieran Powell, a move that selectors expect to pay dividends at the top of the order.

West Indies will seek to extend their strong showing in the bowling department that has been led by speedster Kemar Roach and exciting off-spinner Sunil Narine.

Roach has bowled with pace and accuracy up front while Narine has been superb in the middle overs and at the death, in slowing the Aussie scoring.

Narine has eight wickets at an average of 10 runs and an economy rate of just under three. Roach, meanwhile, has picked up six wickets at 16 runs apiece.

Having escaped Tuesday, Australia will feel a sense of reprieve and aggressive opener David Warner said his team was positive as always and were confident about the challenge ahead of them.

Australia are the top ranked one-day side in the world but have been erratic, and Warner pointed out they would have to make a quicker adjustment to the Caribbean conditions.

"This wicket seems to be similar to that we have in Australia at the WACA (Perth)," Warner said.

"It is a fantastic venue. We had to adapt to Arnos Vale. It was suitable to the West Indies in a sense but both teams had to play on it.

"We are looking to put down some very good scores and use the conditions well. Right now I am thoroughly enjoying my cricket at the moment."

Beausejour has not been a happy hunting ground for West Indies as they have not won here since they beat Zimbabwe by 10 wickets nearly six years ago.

More recently, they lost the doubleheader here last year against Pakistan.

Head groundsman Kent Crafton described the pitch as "balanced" and "good for batsmen and bowlers" but said whoever won the toss, ought to field first.

Squads:

West Indies: Darren Sammy (captain), Johnson Charles, Adrian Barath, Darren Bravo, Marlon Samuels, Dwayne Bravo, Kieron Pollard, Carlton Baugh, Andre Russell, Tino Best, Sunil Narine, Devendra Bishoo, Kemar Roach.

Austaralia: Shane Watson (captain), George Bailey, Dan Christian, Xavier Doherty, Peter Forrest, Peter Nevill, Ben Hilfenhaus, David Hussey, Michael Hussey, Brett Lee, Nathan Lyon, Clint McKay, James Pattinson, Matthew Wade, David Warner. (IANS)