American Strickland taunted Adesanya in the closing seconds of the final frame, confident of victory after 25 minutes of stalking his opponent, defending brilliantly and using his boxing to force Adesanya to fight off the back foot.
The Keralite will take on China's Weng Hong Yang in Sunday's summit clash.
Sri Lanka Cricket has formed a three-member panel including a retired high court judge to investigate the allegations.
Chasing a target of 153, Pakistan rode on a 105-run stand between openers Babar Azam (53) and Mohammad Rizwan (57) as they won with five balls to spare.
It has been learnt that the 31-year-old Gunathilaka was arrested and taken to Sydney City police station in the wee hours of Sunday following an investigation into alleged sexual assault of a woman on November 2.
A target of 180, riding on half-centuries from skipper Rohit Sharma (53 off 39 balls), Virat Kohli (62 not out off 44 balls) and Surya (51 not out off 25 balls), was good enough for the Dutchmen.
It was Australia's biggest loss in a T20 International and New Zealand's first win in any format against their neighbours in Australia since a Test win in Hobart 11 years ago.
Hasnain was first reported during his Big Bash League stint with Sydney Thunder last month and is set to miss Pakistan's home series against Australia next month.
England restored some pride having shown the fight captain Joe Root had asked of them.
The 20-year-old was scheduled to play US Open champion Emma Raducanu in the opening round of the WTA 500 event in Sydney.