England have elected to field first in the blockbuster T20 World Cup final against Pakistan as predicted heavy rain continues to stay away from the MCG.

In a rematch of the famous 1992 ODI World Cup final at the same venue, England captain Jos Buttler had no hesitation in sending Pakistan in to bat after winning the toss.

Play is due to get underway at 7pm AEDT in front of more than 80,000 fans.

"Huge game, good nerves, good energy around the team and in the stadium," Buttler said.

"Both teams in red-hot form, looks a good wicket, a bit of weather around which is why we bowled first."

England will take an unchanged team into the decider after smashing India by 10 wickets in Thursday night's semi-final at the Adelaide Oval.

Key fast bowler Mark Wood (hip) and important batter Dawid Malan (groin) will miss out after struggling with injury.

Despite a forecast of heavy showers and possible storms, rain has so far stayed away from Melbourne on Sunday.

Rain has hit large parts of northern Victoria but nothing has fallen around the MCG and both teams have been able to warm-up out on the ground.

Up to 20mm of rain and a possible storm was expected for Melbourne on Sunday, with the Bureau of Meteorology forecasting a 100 per cent chance of showers.

To constitute a match, a minimum of 10 overs per team is required, unlike the group stage when only five overs per-side was needed to complete a game.

If the final is washed out, world governing body the ICC has left Monday as a reserve day with play beginning at 3pm.

But inclement weather was also forecast for Melbourne on Monday, with a 95 per cent chance of showers and up to 10mm of rain predicted.

If play starts on Sunday and is later stopped, the game will resume on Monday from where it left off.

In the event rain washes out any prospect of play the competing teams will be forced to share the T20 trophy in what would be a first for an ICC tournament.

It comes after three games at the MCG during the group stage were abandoned due to wet weather.

Another match, also involving England, was shortened because of rain as Ireland upset their highly fancied opponents.

England are trying to become the first team to hold the ODI and T20 World Cups at the same time after their memorable win in the 2019 50-over final at Lord's.

T20 WORLD CUP FINAL TEAMS

ENGLAND: Jos Buttler (capt), Alex Hales, Phil Salt, Ben Stokes, Harry Brook, Moeen Ali, Liam Livingstone, Sam Curran, Chris Woakes, Chris Jordan, Adil Rashid.

PAKISTAN: , Babar Azam (capt), Muhammad Rizwan, Mohammad Haris, Shan Masood, Iftikhar Ahmed, Shadab Khan, Mohammad Nawaz, Mohammad Wasim, Shaheen Shah Afridi, Haris Rauf, Naseem Shah

© AAP 2022