The remarkable summer of Daniil Medvedev continued at the United States Open on Friday night, as he fought his way into his first Grand Slam final.

The fifth-seeded Medvedev, a lanky and vexing player with an unconventional style, defeated the unseeded Grigor Dimitrov, 7-6 (5), 6-4, 6-3, in a semifinal under the roof in Arthur Ashe Stadium. Medvedev is the first Russian man to reach the U.S. Open final since Marat Safin won the tournament in 2000.

Safin is also the last Russian man to win a Grand Slam tournament, the 2005 Australian Open. But Medvedev, who gained infamy earlier in the tournament for his boorish on-court behavior, still needs to win three tough sets in order to take home the winner’s trophy.

On Sunday, he will face No. 2 Rafael Nadal in the final. Nadal fought off a game challenge from No. 24 Matteo Berrettini, 7-6 (6), 6-4, 6-1, and is now one win away from capturing his 19th Grand Slam title, which would put him one behind Roger Federer’s record.