It is a do-or-die match for Pakistan when they take on Australia in the Super Eights match of the World Twenty20 in Colombo, on Tuesday.

The 2009 champions will need to beat Australia to keep their hopes alive of making it to the semi-finals.

Here are the scenarios from Group 1:

1. Pakistan need to win their match against Australia and then hope that India don't beat South Africa by a bigger margin.

2. Australia, who have won their first two matches in the Super Eights, are in a strong position to make it to the semi-finals but they are not safe yet. If they loss to Pakistan by a huge margin and if India can post a big win against South Africa, then they can also be knocked out of the tournament.

3. For India, the task becomes straightforward if Australia beat Pakistan, they will then need to beat South Africa to go through to the last four. Even if Pakistan beat Australi, they will need to beat South Africa by a bigger margin to advance.

4. South Africa's hopes of going to the semi-finals rests big time on Australia. If Pakistan beat Australia, then South Africa will be out of the tournament even before their match against India. However, if Australia beat Pakistan by a big margin and they can register a convincing win over India, they can still go through.