Alex Carey, Colin Ingram and Peter Siddle stood out with their performances as Adelaide Strikers edged Sydney Thunder by 20 runs.
After posting 175/4, the Strikers defended grandly, restricting the Thunder to 155/6 and improving their perfect record in end-of-year marquee matches.
Callum Ferguson (47) kept the Thunder afloat as wickets fell around him and the asking rate escalated, but when he holed out to Jake Weatherald off Peter Siddle (3/20), it was game over for Sydney Thunder.
Player-of-the-match Siddle got rid of the dangerous England duo of Jos Buttler (23) and Joe Root (18) while Thunder captain Shane Watson also made a promising start before holing out for 28.
Leg-spinner Rashid Khan, bravely taking his place after his father passed away on Sunday night, grabbed 2 for 34.
Earlier, Strikers skipper Colin Ingram emphatically returned to form with a BBL career-best 75 off 43 balls, putting on 65 for the second-wicket with Alex Carey (59).
Ingram, who had scored just 24 runs at 8.00 leading in, smashed six sixes as a 200-plus total looked on the cards.
But when the skipper slogswept Fawad Ahmed's wrong'un to Daniel Sams, the Strikers' innings lost some momentum but the damage had already been done.
Peter Siddle was declared man of the match for his crucial three wickets.