In a gripping semifinal showdown on Arthur Ashe Stadium, Swiatek had to pull off multiple comebacks before making the US Open final for the first time in her career. For the records, Swiatek is the first women's tennis player from Poland to enter the final of US Open.
Swiatek, who had never made a US Open quarterfinal before this season, is now into her third Grand Slam final, her second of the year, and first off of the red clay of Roland Garros.
Belarus' Sabalenka was impressive in the opening set, attacking Swiatek's second serves to generate plenty of break points. Things flipped in the second set, and it was all about Swiatek making the adjustments, increasing her first serve accuracy from 64 per cent in the opener to 94 per cent in the second.
Sabalenka threatened to run away with things late - twice managing to go up a break in the third set - but Swiatek showed composure beyond her years as she continued to fight back.
Earlier, world No.5 Jabeur was dominant in the opening set, winning 75 per cent of her service points and 61 per cent of her return points, allowing no break point opportunities while taking all three of her own chances to break.
She wrapped up the first set in 24 minutes, and after an even start to the second frame, Jabeur capitalised on her first and only break point chance to grab the decisive lead. Tunisia's best ever tennis export served things out in style, finishing the match without Garcia ever seeing a break point chance.
All over for Garcia
It ended a remarkable run for Garcia, who entered the contest on a 13-match winning streak, with 31 wins from her past 35.
After dominating Coco Gauff in the quarterfinals, Garcia had become the betting favourite to win the tournament. But Jabeur had other ideas. For Jabeur, it continues a career-best season after reaching her first-ever Grand Slam final at Wimbledon and the 28-year-old will move up to No.2 in the latest WTA rankings.