This group is accepted as the toughest to emerge from but a victory for either Australia or Sri Lanka to make it two from two would leave them strongly placed for a semi-final slot.
Both sides chased successfully in their opening games, but Sri Lanka's was more convincing than Australia's albeit on a surface that was easier for strokeplay in Sharjah. The two teams last met in 2019 when Australia won 3-0 in home conditions.
Having come through the qualifying stage unbeaten, Sri Lanka are building some nice momentum having been an unfancied side before the tournament. The way Charith Asalanka and Bhanuka Rajapaksa resurrected the innings against Bangladesh will have been a huge fillip.
For Australia, there was a bit of a sigh of relief to get over the line against South Africa, a match that shaped as vital for their hopes of progressing. They were excellent with the ball and in the field - led by Josh Hazlewood's superb opening spell and the bonus of Glenn Maxwell's four overs - but if they are to go deep in the competition, they will need David Warner and Aaron Finch to fire.
Australia WLWLL (last five completed T20Is, most recent first) Sri Lanka WWWWL
In the spotlight
Before the tournament, Marcus Stoinis spoke to ESPNcricinfo about wanting to make himself into the best finisher in the world. One innings does not mean he has cracked the role, but it was significant that he was able to see Australia across the line when the pressure was on having fallen short previously. It would be a major box ticked if Stoinis can make a long-term success of it.
Lahiru Kumara was certainly fired up against Bangladesh and his actions after dismissing Liton Das, where he squared up to the batter and had to be separated by team-mates and umpires, cost him 25% of his match. He has pace and could trouble Australia's top order that has some uncertainty about it. He needs to be careful to keep his cool, though.
While Justin Langer has said Australia will be flexible with their selections, it would appear unlikely they will change unless there are specific match-ups they want for the Sri Lankans. Mitchell Marsh and Stoinis were not needed with the ball against South Africa, so they provide extra options if Maxwell (or anyone else) can't get through four overs.
Australia (probable) 1 David Warner, 2 Aaron Finch (capt), 3 Mitchell Marsh, 4 Steven Smith, 5 Glenn Maxwell, 6 Marcus Stoinis, 7 Matthew Wade (wk), 8 Pat Cummins, 9 Mitchell Starc, 10 Adam Zampa, 11 Josh Hazlewood
Sri Lanka may also be unchanged although they could recall spinner Maheesh Theekshana, who missed the Bangladesh game with a side strain. If so he would likely replace Binura Fernando.
After the match where West Indies were skittled for 55, Pakistan and South Africa have both chased middling targets comfortably in Dubai, which suggest batting second is the way to go. Dew could be a factor although not as much as in Abu Dhabi or Sharjah.
Stats and trivia
Going by the match-up data, Maxwell taking the new ball will be a good tactic again: in 13 balls against Kusal Perera in T20Is, he has dismissed him twice.
This is a contest between the two teams (who are in the Super 12s) with the lowest win percentage in 2021 - Australia is at 31.2% and Sri Lanka 43.7%.
In his search for runs, Warner won't mind seeing Sri Lanka against whom he averages 55.90 in T20Is.
"The other day I saw their bowlers swing the ball early, then they bashed a length as well with the guys who have a bit of pace. So for it's about identifying that the wicket suited that and Dubai might be a bit different, bigger boundaries, so they might go shorter." David Warner on Sri Lanka's quicks