Daniil Medvedev reached his first Grand Slam final with a tense US Open semi-final victory over Grigor Dimitrov.
Russian fifth seed Medvedev, 23, edged the crucial points to win 7-6 (7-5) 6-4 6-3 on Arthur Ashe Stadium.
Little separated the pair in the opening two sets before Bulgarian Dimitrov, now ranked 78th in the world, faded in the third at Flushing Meadows.
Medvedev will face Spanish second seed Rafael Nadal or Italian 24th seed Matteo Berrettini in Sunday's final.
Heavy favourite Nadal, 33, takes on 23-year-old Berrettini, a first-time Grand Slam semi-finalist, later on Friday as he chases a 19th major title.