The dream of an all-American triumph at the US Open was extinguished in dramatic fashion as Elena Rybakina fought back from a set down to defeat Coco Gauff, setting up a blockbuster final against defending champion Aryna Sabalenka.
With former First Lady Michelle Obama among those cheering Gauff from the stands, the American favourite appeared on course for another memorable night in New York after taking the opening set 6-3.
But Rybakina refused to buckle under the pressure.
The 27-year-old Kazakhstan star recovered to win the second set 6-4 before producing another composed display in the decider to complete a 3-6, 6-4, 6-4 victory and end Gauff's hopes of lifting the title on home soil.
Rybakina's victory was particularly significant because her run to the semi-finals also propelled her to the top of the world rankings, displacing Sabalenka as the new world number one.
Now, she has the opportunity to take something even more valuable from Sabalenka when the pair meet in Saturday's final: the US Open trophy.
Gauff unable to hold off Rybakina comeback
Gauff made the stronger start, breaking for a 4-2 advantage before holding serve to love to put herself firmly in control of the opening set.
However, the American's previously reliable game began to unravel as the match progressed.
Her serve became less dependable, while errors off her forehand handed Rybakina opportunities to claw her way back into the contest.
The Kazakh took full advantage, securing the second set 6-4 and forcing the match into a deciding set as the tension inside Arthur Ashe Stadium intensified.
Neither player was willing to give ground easily in the final set.
But with the score at 4-3, a wide forehand from Gauff handed Rybakina a crucial break point. The 27-year-old converted the opportunity to move within one game of victory.
Gauff, refusing to surrender in front of her home crowd, immediately produced one of the shots of the match.
A stunning backhand struck on the run, followed by a defiant scream, helped her stay alive and gave the American supporters renewed hope.
That resistance, however, proved temporary.
Rybakina responded with a well-executed volley to earn two match points. She needed only one.
Gauff's desperate overhead attempt sailed long, sending Rybakina into the final and ending another emotionally charged US Open campaign for the American.
Sabalenka powers past Pegula
Waiting for Rybakina in the final will be Sabalenka, who earlier dispatched American third seed Jessica Pegula 7-5, 6-2.
The victory sent the Belarusian into her fourth consecutive US Open final and extended her winning streak at Flushing Meadows to 19 matches.
More importantly, Sabalenka is now just one victory away from completing a remarkable three-peat.
The two-time defending champion was pushed hard by Pegula in the opening set, with the American producing an impressive serving performance.
Pegula won 18 of 20 points behind her first serve and looked capable of taking the set deep into a deciding phase.
Sabalenka, however, found another gear at the crucial moment.
Serving at 5-6, Pegula suddenly found herself under immense pressure as Sabalenka unleashed three powerful returns in succession to create three set points.
The top seed converted the second opportunity after Pegula's forehand dropped into the net, giving Sabalenka the opening-set advantage.
The momentum shifted decisively in the second set.
Sabalenka began applying relentless pressure on Pegula's serve, creating more break-point opportunities in the fourth game. An explosive 91mph return further underlined her control as she moved towards the finish line.
The match was wrapped up in just one hour and 20 minutes.
Unlike the emotional celebrations that often accompany a Grand Slam victory, Sabalenka marked the win with a simple clenched fist, maintaining her focus on the bigger prize still within reach.
Blockbuster final awaits
The final now pits two of the women's game's biggest hitters against each other.
For Sabalenka, victory would complete a historic three consecutive US Open titles and extend her extraordinary dominance in New York.
For Rybakina, it represents an opportunity to add the US Open crown to her Wimbledon title and underline her emergence as the new world number one.
The stakes could hardly be higher.
One player is chasing history.
The other is chasing the champion's crown.
And after eliminating Gauff and Pegula, the two will meet with the Flushing Meadows spotlight firmly on them.