Dominik Koepfer was born on April 29, 1994, in Furtwangen, Germany, to Thomas and Marianne Koepfer. His father is an engineer, while his mother is a pharmacist. Koepfer’s parents introduced him to tennis after both played the sport themselves.
He played college tennis from 2013 to 2016 at Tulane University, New Orleans, Los Angeles. Koepfer made his ATP Tour debut as a lucky loser at the 2017 Winston-Salem Open. Ironically, his first victory on the ATP Tour came a year later against Tennys Sandgren in Winston-Salem after he entered the main draw as a lucky loser once again.
The German only amassed five ATP wins in 2019. Yet, these were all at the Grand Slam level. The first came against Filip Krajinovic at Wimbledon, before losing in the next round against Diego Schwartzman in straight sets.
Koepfer then had a very good run at the US Open just a few weeks later. After qualifying for the main draw, he progressed all the way to the fourth round after triumphs against Jaume Munar, Reilly Opelka, and Nikoloz Basilashvili. His run was ended by the eventual runner-up Daniil Medvedev.
The most notable moment of Koepfer’s 2020 season came at the Italian Open. He reached his first ATP Masters 1000 level quarterfinal at the event after defeating Alex de Minaur, Gael Monfils, and Lorenzo Musetti to reach that stage. Koepfer lost a close match 3-6, 6-4, 3-6 to the eventual champion Novak Djokovic.
2021 brought more consistent results for Koepfer on the ATP Tour. He won 22 matches, which was far more than he managed in previous seasons. That included reaching the third round of the French Open and Wimbledon for the first time. The German finished 2021 as the world No. 54.
2022 was a much more difficult year for the German. A combination of a loss of form and injuries saw him end the year ranked outside the Top 200. However, he fought back very admirably in 2023 by making it to 5 Challenger Tour finals, ending the season ranked inside the Top 100.
Koepfer had some good results at the start of 2024. After winning the Challenger Tour title in Canberra to start the year, he progressed to the fourth round at the Miami Open, including a win against the 14th seed, Ugo Humbert. His positive run was once again ended by the eventual runner-up, Daniil Medvedev.
