MONTREAL -- The National Bank Open is set for an all-American final after Ben Shelton and Brandon Nakashima powered through their semifinal matches on Wednesday night at IGA Stadium.

Shelton, the defending champion and fifth seed, delivered a commanding performance against 20-year-old compatriot Learner Tien, winning 6-2, 6-3 in just over an hour. The 23-year-old left-hander broke Tien's serve early in both sets, dictating play with heavy groundstrokes and a booming serve that kept the 12th seed off balance. Tien, who had upset several higher-ranked players during the week, struggled to find rhythm against Shelton's relentless aggression.

"Super happy with the performance," Shelton said after the match. "Learner is a guy who presents me with a lot of problems in my game. A tough challenge to overcome. To get a win over him in the fashion that I did, I'm super pleased with that."

Shelton's victory extends his winning streak at the tournament to nine matches, dating back to his title run last year. He has now reached his third Masters 1000 final, having previously won in Montreal in 2025 and reached the final in Cincinnati last season. The Florida native has been a force on hard courts, capturing three titles in 2026 alone -- Dallas, Munich, and Stuttgart -- and has climbed to a career-high ranking of No. 4 in the world.

Earlier in the evening, Brandon Nakashima punched his ticket to the biggest final of his career. The 28th seed from San Diego edged out Spanish teenager Rafael Jodar 7-6 (3), 6-4 in a tense semifinal that lasted nearly two hours. Nakashima, 24, relied on his precise serve-and-volley game and steady baseline rallies to counter Jodar's explosive power. After saving a set point in the first set, Nakashima dominated the tiebreak and then secured a crucial break early in the second set to take control.

"Going into the tournament, I knew I was playing at a really high level, so I knew that I could get a go on a deep run here," Nakashima said. "Obviously, wasn't thinking about the final or anything."

This is Nakashima's first ATP Masters 1000 final, and his first title match at any level since winning his lone tour title in San Diego in 2022. He has shown remarkable consistency in Montreal, defeating three seeded players en route to the final, including a quarterfinal upset of second seed Daniil Medvedev.

The final will be only the second all-American championship match in the history of the National Bank Open, and the first since 1995 when Andre Agassi defeated Pete Sampras. Shelton enters as the favorite, having won their only previous meeting in the 2023 Atlanta Open, but Nakashima has been improving rapidly on hard courts this season.

Both players bring contrasting styles: Shelton's power and aggression against Nakashima's tactical precision and variety. The match is scheduled for Thursday evening, with the winner earning 1,000 ATP ranking points and a substantial prize purse.

The tournament has also been notable for the emergence of young American talent. In addition to Shelton and Nakashima, Tien's run to the semifinals was a breakout performance, and the 20-year-old is expected to crack the top 50 for the first time next week. The depth of American men's tennis is on full display in Montreal, where three of the four semifinalists were from the United States.

Shelton's path to the final included straight-sets wins over Alexander Bublik, Jannik Sinner, and now Tien. Nakashima, meanwhile, has dropped only one set all week, coming in his quarterfinal against Medvedev. The stage is set for a captivating showdown between two of America's brightest stars.