Dominik Koepfer (born 29 April 1994), also spelled Köpfer, is a German inactive 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. 69 on 24 June 2024. He played college tennis at Tulane University.
Professional career 2017-2018: ATP debut, First ATP win Koepfer made his ATP main draw debut at the 2017 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 2018 Winston-Salem Open, defeating Tennys Sandgren.
2019: First Challenger title, Major debut and fourth round, top 100 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.
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. As a result he reached the top 100 at world No. 86 on 9 September 2019.
2020: First Top-10 win, Masters quarterfinal 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.
2021: Top 50, two major third rounds 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 on 22 March 2021. 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. At the Madrid Open, despite a second-round loss to 16th seed Cristian Garín, he reached the top 50 following the tournament on 10 May 2021. His final tournament before the second Major of the year was the Geneva Open where he upset seventh seed Benoît Paire in a three-set victory. He ended up losing in the quarterfinals to third seed and eventual champion, Casper Ruud. 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. He was defeated in the second round by seventh seed Pablo Carreño Busta. Seeded 16th at the Winston-Salem Open, he reached the third round where he was beaten by top seed Carreño Busta. At the US Open, he lost in the second round to second seed and eventual champion, Daniil Medvedev.
Competing at the first edition of the San Diego Open, Koepfer was defeated in the first round by eventual finalist Cameron Norrie. At the Indian Wells Masters, he fell in the first round to Emil Ruusuvuori in three sets. In Vienna, he was eliminated in the final round of qualifying by Gianluca Mager. Entering the main draw as a lucky loser, he lost in the first round to Lorenzo Sonego. In Paris, he lost in the final round of qualifying to Miomir Kecmanović but due to the withdrawal of Jenson Brooksby, he entered the main draw as a lucky loser and defeated Andy Murray in the first round, saving seven match points. His victory was named one of the top-5 comebacks of the 2021 season. In the second round, he upset ninth seed Félix Auger-Aliassime. With this win, he ended the Canadian's hopes of qualifying for the ATP finals. In the third round, he lost to seventh seed Hubert Hurkacz in three sets.
2022: Loss of form, out of clay season and of top 200 At the Australian Open, Koepfer defeated Carlos Taberner before losing to 23rd seed Reilly Opelka in the second round. Due to an ongoing arm injury, he decided to skip the entire clay season. As a result, his ranking plummeted to No. 149 on 18 July 2022, out of the top 150 at No. 159 on 22 August 2022, and out of the top 250 at No. 259 on 7 November 2022.
Following his title at the Calgary National Bank Challenger, he returned to the top 200 at world No. 195 climbing 64 positions up in the rankings on 14 November 2022 only to drop again to No. 202 on 28 November 2022.
2023: Two Challenger titles, back to top 100, ATP doubles final Ranked No. 262, Koepfer won his third Challenger at the Mexico City Open and returned to the top 200 at world No. 179 up more than 80 positions in the rankings. The following week, he reached a second final at the San Luis Open Challenger. As a result, he moved another 25 positions into the top 155. He also made the final at the 2023 Prague Open and reached the top 150 on 8 May 2023. Koepfer won his fourth Challenger title at the Challenger 175 at the Piemonte Open in Turin as an alternate and moved close to 50 positions up, a couple of positions shy of the top 100 on 22 May 2023.
Koepfer reached the semifinals at the Los Cabos Open where he lost to fifth seed Alex de Minaur. At the same tournament, he also reached his maiden ATP final with Andrew Harris. At the 2023 US Open Koepfer lost to world No. 1 and defending champion Carlos Alcaraz after retiring due to injury, having rolled his ankle.
2024-2025: Major doubles semifinals, Masters fourth round, injury, hiatus He won his fifth Challenger at the 2024 Canberra Tennis International.
He then competed in the 2024 Australian Open, beginning his campaign against fellow compatriot and sixth seed Alexander Zverev, falling in four tight sets. In doubles, alongside his compatriot Yannick Hanfmann he reached the semifinals as an unseeded pair, before losing to Italian duo Simone Bolelli and Andrea Vavassori.
At the 2024 Dallas Open he reached the quarterfinals defeating Aleksandar Kovacevic and Rinky Hijikata. He lost to eventual champion Tommy Paul. He reached a second quarterfinal for the season at the 2024 Abierto Mexicano Telcel in Acapulco, defeating qualifier Térence Atmane and eight seed Frances Tiafoe. He lost to second seed Holger Rune. He reached a new career-high ranking of No. 49 on 4 March 2024. At the 2024 Miami Open, he defeated Marcos Giron, 18th seed Sebastián Báez and 14th seed Ugo Humbert to reach the fourth round of a Masters for the second time, recording his first wins at this tournament before losing to Daniil Medvedev.
Performance timelines
Singles Current through the 2025 ATP Tour.
Tournament2017201820192020202120222023202420252026SRW–LWin %Grand Slam tournamentsAustralian OpenAAQ21R2R2RA1R1RA0 / 52–5French OpenAAQ22R3RAQ31RA0 / 33–3WimbledonAQ32RNH3R1R1RAA0 / 43–4US OpenAA4R1R2RQ11R1RA0 / 54–5Win–loss0–00–04–21–36–41–20–20–30–10–00 / 1712–17National representationSummer OlympicsNH3RNH3RNH0 / 24–2Davis CupAAAQRSFAAQRA0 / 13–2ATP 1000 tournamentsIndian Wells OpenAAANH1R2RA1RA0 / 31–3Miami OpenAAANH1R1RA4RA0 / 33–3Monte-Carlo MastersAAANH1RAA1RA0 / 20–2Madrid OpenAAANH2RAA1RA0 / 21–2Italian OpenAAAQFAAA3RA0 / 25–2Canadian OpenAAANHQ1AAAA0 / 00–0Cincinnati OpenAAAQ22RAAAA0 / 11–1Shanghai MastersAAQ2NHAAA0 / 00–0Paris MastersAAAA3RAQ1AA0 / 12–1Win–loss0–00–00–03–14–61–20–05–50–00–00 / 1413–14Career statistics2017201820192020202120222023202420252026CareerTournaments124624961920Career total: 73Hard win–loss0–11–13–32–312–143–67–58–81–20–00 / 4137–43Clay win–loss0–00–10–05–38–90–00–06–90–00–00 / 2219–22Grass win–loss0–00–01–10–02–30–30–12–20–00–00 / 105–10Overall win–loss0–11–24–47–622–263–97–616–191–20–00 / 7361–75Win % Career total: Year-end ranking30516194665420177102509
Doubles Tournament2019202020212022202320242025SRW–LGrand Slam tournamentsAustralian OpenAA2R2RASFA0 / 36–3French OpenAA2RAA2RA0 / 22–1WimbledonANH2RAAAA0 / 11–1US OpenAA3RAAAA0 / 11–1Win–loss0–00–04–41–10–05–10–00 / 710–6National representationSummer OlympicsNHANHQFNH0 / 12–1Career statisticsTournaments10133110028Titles00000000Finals00001001Overall win–loss2–10–014–112–33–111–90–032–25Year-end ranking31441210447538788 –
ATP career finals
Doubles: 1 (1 runner-up) LegendGrand Slam tournaments (0–0)ATP Masters 1000 (0–0)ATP 500 (0–0)ATP 250 (0–1)Finals by surfaceHard (0–1)Clay (0–0)Grass (0–0)
ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreLossLos Cabos Open, MexicoATP 250Hard Andrew Harris Santiago González Édouard Roger-Vasselin4–6, 5–7
ATP Challenger finals
Singles: 11 (5–6) Finals by surfaceHard (2–3)Clay (2–3)Grass (1–0)
ResultW–LDateTournamentSurfaceOpponentScoreLoss0–1San Francisco, United StatesHard (i) Jason Jung4–6, 6–2, 6–7(5–7)Win1–1Ilkley, United KingdomGrass Dennis Novak3–6, 6–3, 7–6(7–5)Loss1–2Aptos, United StatesHard Steve Johnson4–6, 6–7(4–7)Loss1–3Cary, United StatesHard Michael Mmoh5–7, 3–6Win2–3Calgary, CanadaHard (i) Aleksandar Vukic6–2, 6–4Win3–3Mexico City, MexicoClay Thiago Agustín Tirante2–6, 6–4, 6–2Loss3–4San Luis Potosí, MexicoClay Tomás Barrios Vera6–7(6–8), 5–7Loss3–5Prague, Czech RepublicClay Jakub Menšík4–6, 3–6Win4–5Turin, ItalyClay Federico Gaio6–7(5–7), 6–2, 6–0Loss4–6Calgary, CanadaHard (i) Liam Draxl4–6, 3–6Win5–6Canberra, AustraliaHard Jakub Menšík6–3, 6–2
Doubles: 1 (1–0) Finals by surfaceHard (1–0)Clay (0–0)
ResultW–LDateTournamentSurfacePartnerOpponentsScoreWin1–0Columbus, United StatesHard (i) Denis Kudla Luke Bambridge David O'Hare7–6(8–6), 7–6(7–3)
ITF Futures finals
Singles: 5 (4–1) Finals by surfaceHard (3–0)Clay (1–1)
ResultW–LDateTournamentSurfaceOpponentScoreWin1–0USA F32, HarlingenHard Luke Bambridge6–4, 6–4Loss1–1USA F5, WestonClay Hugo Dellien2–6, 5–7Win2–1USA F5, OrlandoClay Tommy Paul4–6, 6–3, 7–5Win3–1USA F24, ChampaignHard Jose Statham6–7(5–7), 6–2, 7–5Win4–1Canada F2, SherbrookeHard (i) Michael Redlicki6–7(3–7), 7–5, 6–2
Doubles: 4 (1–3) Finals by surfaceHard (1–2)Clay (0–1)