Zimbabwe followed up its five wickets thrashing of neighbour Kenya in Taunton with an upset three-run win over a patchy Indian side in Leicester on Wednesday.

A win over Sri Lanka on Saturday will put Zimbabwe in the Super Sixes probably along with South Africa and England, the other group A teams.

``We know to qualify for the next round we must win a minimum of three matches,'' skipper Alistair Campbell said Friday during a practice session. ``This is going to be a big game for us.

Because Sri Lanka has lost both matches ``we could face the backlash of it all. If we are not careful they could pull the carpet from under our feet,'' Campbell said.

Zimbabwe, 80-1 outsiders before the start of the tournament with just three wins from 25 World Cup matches, will draw strength from its back-to-back wins against Sri Lanka in Sharjah lastyear.

``It just goes to show the strength of the individuals in the team. What we are showing now is all the hard work we've put together over the years. For some of them, this could be the last chance,'' Campbell said.

``The other sides have played enough against us to know we can play decent cricket. They won't be underestimating us.''

For Sri Lanka, it would be the moment of truth.

It has failed to play as defending champions and a defeat against Zimbabwe will almost certainly spell its end in the tournament. Sri Lanka's recent form -- four victories out the last 20 games -- suggests the team is well past the expiry date.

Although the bowling has been encouraging, the pinch-hitting it so successfully used to re-invent one-day cricket has been the undoing of a team full of stroke makers.

``If we change our style, we'll be boring,'' skipper Arjuna Ranatunga said after a defeat at the hands of South Africa.

``But one thing is for sure, we have to show discipline at the top of the order,'' hesaid.

Sri lanka is expected to reshuffle its batting order again, promoting Roshan Mahanama to open the batting with Sanath Jayasuriya and bat Mahela Jayawardene at No. 3 instead of an out of form Marvan Atapattu.

``We are considering a few options,'' said DS de Silva, the manager, who will take over as coach after the World Cup. The former Sri Lankan leg spinner will replace Roy Dias.

``We got our combination wrong against South Africa. We were a seamer short and it made all the difference at the end,'' he said.

With the New Road pitch expected to offer early assistance to the seamers, Sri Lanka is considering replacing leg-spinner Upul Chandana with Eric Upashantha, who bowled first change to Chaminda Vaas and Pramodya Wickremasinghe.