[2] Tristan won the PAC-12 team championship in 2021 as freshman and was the only Stanford player in 2021 Pac-12 tournament to go undefeated.

He left Stanford in March 2022 to pursue professional tennis full-time under the Pac-12 Athlete Graduation Benefits Program.

230 and seeded third, Boyer won his maiden ATP Challenger singles title at the inaugural 2024 Yucatán Open and reached the top 200 at world No.

[11] On November 17 Boyer won his third Challenger singles title in Montevideo, Uruguay, defeating Hugo Dellien in straight sets.

[12][13] Boyer made his Grand Slam tournament debut at the Australian Open after qualifying into the main draw.

[14] He defeated Federico Coria in five sets in the first round,[15][16] before losing his next match to eighth seed Alex de Minaur.