In a tour that hasn't gone to plan after a sparkling start, West Indies travel to a ground on which they posted both their wins on the tour so far against a formidable South African line-up.

West Indies upset the hosts at St George's Park in both the first Twenty20 international and the first Test, but have lost their way since. A loss in Sunday's ODI would see them surrender the series, but the visitors are not the only team with a few worries.

South Africa have done poorly in Port Elizabeth of late - their last win came in an ODI against India in November 2006 - and coach Mickey Arthur said the team were eager to perform.

"I'm not a 100% sure why we haven't played to the best of our abilities there, but all I do know is the team will be keen to put on a very good performance, because we've let Port Elizabeth down of late," Arthur told the Independent. South Africa, though, would take confidence from the convincing win in Cape Town, where West Indies never looked in the hunt while chasing 256.

Herschelle Gibbs and Jacques Kallis failed in Cape Town, and it was the left-handed batsmen Graeme Smith and JP Duminy who did the bulk of the scoring. South Africa, however, were unable to pick up the momentum towards the close of their innings - perhaps falling 15-20 runs short - but it didn't have a bearing on the final result.

Arthur indicated there wouldn't be many changes, given the series is still alive. The bowlers never looked in trouble against a brittle West Indian line-up. Shaun Pollock, playing his farewell ODI series, had impeccable figures of 10-5-13-2, while Morne Morkel's career-best figures of 4 for 36 suggested he'd recovered fully from the injury that had ruled him out since South Africa's tour to Pakistan last year.

"Before we start looking to juggle the side too much, we want to try and get the series out of the way first, and then look to give our other squad guys an opportunity," Arthur said. "We have quite a few niggles in the squad and we need to manage those. But I don't foresee too many changes."

For West Indies, it's the batting that's the main concern. Shivnarine Chanderpaul was expected to play at No. 3 in Cape Town in order to provide much-needed momentum at the top, but a bruised knee meant he came in at No. 5 and batted with a runner. Chanderpaul's 54 was the only significant resistance to South Africa's attack and if he can't take the field on Sunday, it would be another headache for West Indies, who are already missing the batting skills of Chris Gayle.

Jerome Taylor and Fidel Edwards made a promising start in Cape Town. Taylor nipped out both Gibbs and Kallis, but his four-wicket haul was not backed up by his team-mates. Stand-in captain Dwayne Bravo, who bowled despite a side strain in the first ODI, might again have to send down a few overs himself. Bravo would also like to change his luck at the toss; he's called it wrong the last three occasions, perhaps a right one could help bring about the right result.

Teams (probable)
South Africa
Graeme Smith (capt), Herschelle Gibbs, Jacques Kallis, AB de Villiers, JP Duminy, Mark Boucher (wk), Shaun Pollock, Johan Botha, Charl Langeveldt, Dale Steyn, Morne Morkel.

West Indies
Brenton Parchment, Sewnarine Chattergoon, Shivnarine Chanderpaul, Runako Morton, Marlon Samuels, Dwayne Bravo (capt), Denesh Ramdin (wk), Darren Sammy, Daren Powell, Fidel Edwards, Jerome Taylor.