Down 4-0 in the first set, the crowd inside Arthur Ashe tried to will Coco Gauff back to life.

One set later, they got their wish.

The American forced the second set with reigning French Open champ Mirra Andreeva into a tiebreak, which Gauff managed to take it, 7-6(7), and then put Andreeva on her heels in the deciding match to punch her ticket to the U.S. Open semifinals with a 6-2, 7-6(7), 6-2 win on Wednesday.

Coco Gauff of the United States celebrates against Mirra Andreeva. Getty Images

Gauff managed to save two match points in the second set to stave off elimination during the tiebreak, which also included an incredible 39-shot rally with Andreeva, in which she took the point to go up 5-3.

The American seemed to have found her groove in the final set, even frustrating Andreeva to the point of slamming her racket to the ground after going down 2-1.

Coco Gauff of USA returns a ball to Mirra Andreeva of Siberia in the quarterfinals in Arthur Ashe Stadium. Corey Sipkin for the NY POST

Gauff will face Elena Rybakina in the semifinals.

Coco Gauff of the United States celebrates after defeating Mirra Andreeva in their Women’s Singles Quarterfinal match. Getty Images

Coco Gauff of the U.S. shakes hands with Russia’s Mirra Andreeva after winning her quarterfinal match on Wednesday. REUTERS

Coco Gauff of the United States serves to Mirra Andreeva of Russia during the quarterfinal round of the U.S. Open tennis championships on Wednesday, Sept. 9, 2026, in New York. AP Photo/Seth Wenig