Iva Jovic defeated Alex Eala 7-5, 3-6, 7-5 in a three-hour marathon at Arthur Ashe Stadium on Saturday night
The 18-year-old American overcame a 4-2 deficit in the deciding set to secure her place in the fourth round
Jovic will face compatriot Coco Gauff on Monday, guaranteeing an American woman a quarterfinal spot at the US Open