The T20 World Cup final is on Sunday, 8 March. The Super 8 stage at the T20 World Cup is in full flow with four semi-final spots up for grabs. England were the first team to qualify for the next phase after claiming convincing wins over Sri Lanka and Pakistan in their opening two Super 8 fixtures. South Africa have also joined them.

Here's what the remaining teams still in contention need to progress to the next stage. A total of eight teams progressed to the Super 8 stage, with each being placed into two groups - Group 1 and Group 2.

• Group 1: West Indies, South Africa, India, Zimbabwe
• Group 2: England, New Zealand, Pakistan, Sri Lanka

Each team plays three matches in the Super 8 phase, facing each of the other teams in their respective group once. After those fixtures, the top two teams in each group will advance to the semi-finals, with the winner of each Super 8 group facing the runner-up from the other. South Africa are through after two impressive victories out of two.

India and West Indies are effectively playing for a spot in the semi-finals when they meet on 1 March. Zimbabwe were eliminated after losing against India on 26 February. England are through to the semi-finals after three straight wins. New Zealand face a nervy wait following their defeat by England.

If Pakistan fail to beat Sri Lanka on Saturday then the Black Caps will be through, but victory for Salman Ali Agha's side would see second place decided by net run-rate (NRR). The average first-innings in Pallekele in this tournament is 164 - if Pakistan achieve that they would need to restrict Sri Lanka to 100 or less to overtake New Zealand's net run-rate. A winning margin of around 64 runs is required if batting first. In a chase of 165, Pakistan would have around 14 overs to overtake New Zealand's NRR. The calculations will become a lot clearer at the halfway stage of their match.

Sri Lanka are eliminated following their defeat by New Zealand on 25 February. Net run-rate is the common method for differentiating teams level on points in a limited-overs cricket tournament. It is a formula that measures a team's average margin of victory, or defeat - a side with several big wins will have a positive net run-rate, while those who have suffered sizeable losses will have a negative one.

To understand net run-rate, you have to first get your head around run-rate. That's the average number of runs scored per over by a team in the innings of one match - so, for example, a score of 140 off 20 overs for Team A equals seven runs per over. Net run-rate is then calculated by subtracting the opposition's run-rate from the other team's run-rate. So if Team B scored 130 off 20 overs, their run-rate would be 6.5 runs per over. Therefore Team A would emerge from the encounter with a positive net-run rate of 0.500 (7 - 6.5), while Team B would take away one of -0.500 (6.5 - 7).

Once a side has played more than one match in a competition, these figures are calculated cumulatively. Let's say Team A scored 160 runs from 20 overs in their next match, then they would have a tournament total of 300 runs, divided by 40 overs - a run-rate of 7.5. If their second opponents scored 180 runs from 20 overs, we first add that to Team B's score, making 310 divided by 40 overs - that makes 7.75. Take 7.75 from 7.5 and Team A end up with a run-rate of -0.25.

Are we done with the calculations now? Well, not quite... If a team loses and is bowled out early, then we wouldn't want to divide their score by the overs they played, as that would potentially deliver them a higher run-rate than their opponent. Therefore if a team is bowled out inside their allotted overs, their run-rate is calculated by dividing their runs by the maximum overs they could have batted.

What is net run-rate in cricket? Notifications, social media and more with BBC Sport.