Dominik Koepfer (born 29 April 1994), also spelled Köpfer, is a German professional tennis player.
He achieved a career-high ATP singles ranking of world No. 49 on 4 March 2024, and a doubles ranking of No. 92 on 14 February 2022.
He played college tennis at Tulane University.
Koepfer made his ATP main draw debut at the Winston-Salem Open as a lucky loser.
He won his first ATP Challenger Tour title in doubles at the Columbus Challenger, partnering Denis Kudla.
Koepfer won his first match on the ATP Tour, again as a lucky loser at the Winston-Salem Open, defeating Tennys Sandgren.
After winning his maiden Challenger title in singles at the Ilkley Trophy, Koepfer earned a wild card into the Wimbledon Championships.
There, he won his first Grand Slam main draw match by defeating Filip Krajinović in the first round before losing to Diego Schwartzman in straight sets.
2009
At the French Open, he reached the third round for the first time and was defeated by eighth seed, former world number one, and 2009 champion Roger Federer.
Koepfer opened his grass-court season at the Stuttgart Open.
He lost in the first round to Jurij Rodionov.
In Halle, he faced third seed Alexander Zverev in the first round.
He pushed Zverev to three sets but ended up losing the match.
At Wimbledon, he made it to the third round for the first time where he fell to eighth seed Roberto Bautista Agut.
After Wimbledon, Koepfer played at the Hamburg Open.
He was eliminated in the second round by top seed Stefanos Tsitsipas.
Representing Germany at the Summer Olympics, he reached the third round and lost to sixth seed and eventual bronze medalist, Pablo Carreño Busta.
Starting his US Open preparation at the Canadian Open, Koepfer was defeated in the first round of qualifying by Canadian wildcard Peter Polansky.
In Cincinnati, he fell in the final round of qualifying to Marcos Giron before earning a spot in the main draw as a lucky lower.
2016
At the Madrid Open, he was beaten in his second-round match by 16th seed Cristian Garín.
His final tournament before the second Grand slam of the year was the Geneva Open.
He upset seventh seed Benoît Paire in a three-set first round victory.
He ended up losing in the quarterfinals to third seed and eventual champion, Casper Ruud.
2017
As a qualifier at the US Open, Koepfer defeated 17th seed Nikoloz Basilashvili in the third round, before losing to eventual finalist Daniil Medvedev in four sets in the fourth round.
Koepfer reached his first ATP Tour Masters 1000 quarterfinal at the Italian Open, defeating Gael Monfils en route for his first top-10 win before losing to eventual champion Novak Djokovic in three sets.
He reached the second round of the French Open for the first time, losing to Stan Wawrinka in four sets.
Koepfer started his season at the first edition of the Great Ocean Road Open.
He lost in the first round to Australian Christopher O'Connell.
At the Australian Open, he was defeated in the second round by third seed and last year finalist, Dominic Thiem.
Seeded sixth at the Córdoba Open, Koepfer was eliminated in the first round by Federico Coria.
In Buenos Aires, he fell in the second round to fifth seed Albert Ramos Viñolas.
At the Mexican Open, he reached his first ATP tour semifinal beating Mexican wildcard Gerardo López Villaseñor, fourth seed Milos Raonic, and Cameron Norrie.
He ended up losing to second seed, compatriot, and eventual champion, Alexander Zverev.
With this result, Koepfer climbed into the top 60 in the rankings to a career-high of No. 54 in singles.
At the Miami Open, he was beaten in the first round by Hugo Gaston.
Koepfer began the clay-court season at the Monte-Carlo Masters.
Getting past qualifying, he lost in the first round to fellow qualifier Marco Cecchinato.
Next, he competed at the Barcelona Open.
He was defeated in the first round by fellow leftie Corentin Moutet.
Playing in Munich, he was eliminated in the second round by seventh seed, compatriot, and eventual finalist Jan-Lennard Struff.
