Lucas Miedler (; born 21 June 1996) is an Austrian professional tennis player. He has a career-high ATP doubles ranking of world No. 19 achieved on 27 July 2026 and a career high singles ranking of No. 201 achieved on 15 October 2018.
He has won 13 doubles titles on the ATP Tour, seven with compatriot Alexander Erler, at the home tournaments in 2021 and in 2023 Kitzbühel, in 2022 and in 2024 Vienna, as well as in Acapulco, Munich and Antwerp.
Junior career He won the boys' doubles at the 2014 Australian Open where he partnered with Australian Bradley Mousley, defeating the French duo of Quentin Halys and Johan-Sébastien Tatlot 6–3, 7–6(7–3).
Professional career 2015: ATP debut In 2015, Miedler made his ATP World Tour main draw debut by qualifying to the first round of the Vienna Open, where he lost in three sets to Latvian Ernests Gulbis.
2021–2022: Maiden ATP and ATP 500 doubles titles At the 2021 Generali Open Kitzbühel, he won the doubles title partnering Alexander Erler.
The Austrian team of Erler/Miedler clinched their second and biggest title on home soil at the ATP 500 2022 Erste Bank Open without dropping a set.
2023: Major, Masters debuts & first wins, ATP 500 title, top 35 At the 2023 Australian Open the pair Miedler/Erler made their Grand Slam debut where they defeated tenth seeds Rohan Bopanna and Matthew Ebden. At the ATP 500 Mexican Open Miedler won his third title with compatriot Erler defeating en route top seeds Wesley Koolhof and Neal Skupski. As a result, Miedler made his top 50 debut on 6 March 2023 at world No. 43. Miedler partnering Cameron Norrie made his Masters debut at the 2023 BNP Paribas Open and won his first match at the Masters 1000 level, defeating seventh seeds Hugo Nys and Jan Zielinski. He also made his debut with Erler at the Masters in Miami.
At the 2023 Grand Prix Hassan II the pair Miedler/Erler reached the final defeating fifth seeds Maxime Cressy and Albano Olivetti. They lost in the final to Andrea Vavassori and Marcelo Demoliner. They won their fourth title at the 2023 BMW Open in Munich, Germany. At the 2023 Generali Open Kitzbühel, they won their fifth doubles title. As a result, he reached the top 35 in the ATP doubles rankings on 14 August 2024.
2024: Two doubles titles with Erler In October, Miedler won back-to-back doubles titles partnering Alexander Erler, claiming the European Open in Antwerp followed by the Vienna Open.
2025–2026: Top 25, six titles with two different partners With new partner Francisco Cabral, Miedler won the 2025 Gstaad Open and the 2025 Hangzhou Open.
In October 2025, Miedler, with Cabral, reached his 14th ATP Tour doubles final at the ATP 500 Erste Bank Open, but lost to Julian Cash and Lloyd Glasspool. Miedler and Cabral closed the 2025 season with a third title in Athens defeating Santiago González and David Pel in the final, ending in the ATP Live Doubles Teams Race in 11th position. As a result, Miedler finished the season ranked in the top 25 at world No. 23 in the ATP doubles rankings on 10 November 2025.
Alongside Cabral, he won the 2026 Brisbane International, defeating top seeds Julian Cash and Lloyd Glasspool in the final.
In July 2026, partnering Marc Polmans, Miedler won the doubles title at the Gstaad Open, defeating Marcelo Demoliner and Robert Galloway in the final. Six days later they overcame Jakob Schnaitter and Mark Wallner in the final to claim the trophy at the Kitzbühel Open.
Doubles performance timeline
Current through the 2025 Hellenic Championship.
Tournament20152016201720182019202020212022202320242025SRW–LGrand Slam tournamentsAustralian OpenAAAAAAAA2R1R2R0 / 32–3French OpenAAAAAAAA1R2R1R0 / 31–3WimbledonAAAAANHAA2R1R2R0 / 32–3US OpenAAAAAAAA1RA2R0 / 21–2Win–loss0–00–00–00–00–00–00–00–02–41–33–40 / 116–11National representationDavis CupAAAAAAAG1G1G1Q10 / 06–1ATP Masters 1000Indian Wells OpenAAAAANHAA2RAA0 / 11–0Miami OpenAAAAANHAA1R1RA0 / 20–2Madrid OpenAAAAANHAA1RA1R0 / 20–2Italian OpenAAAAAAAA1RA1R0 / 20–2Cincinnati OpenAQF0 / 12–1Shanghai MastersAAAAAnot held2RA1R0 / 21–2Paris MastersAAAAAAAA2RASF0 / 24–2Win–loss0–00–00–00–00–00–00–00–03–50–15–50 / 128–11Career statisticsTournaments0111112631202589Titles0000001132310Finals0000001144515Overall win–loss0–00–10–10–10–10–14–17–634–2724–1837–26106–83Year-end ranking21924226530522921812256404724
ATP career finals Doubles: 18 (13 titles, 5 runner-ups) LegendGrand Slam tournaments (0–0)ATP Tour Masters 1000 (0–0)ATP Tour 500 Series (3–2)ATP Tour 250 Series (10–3)Finals by surfaceHard (7–2)Clay (6–3)Grass (0–0)Finals by settingOutdoors (9–4)Indoors (4–1)
ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreWin1–0Austrian Open Kitzbühel, Austria250 SeriesClay Alexander Erler Roman Jebavý Matwé Middelkoop7–5, 7–6(7–5)Win2–0Vienna Open, Austria500 SeriesHard (i) Alexander Erler Santiago González Andrés Molteni6–3, 7–6(7–1)Win3–0Mexican Open, Mexico500 SeriesHard Alexander Erler Nathaniel Lammons Jackson Withrow7–6(11–9), 7–6(7–3)Loss3–1Grand Prix Hassan II, Morocco250 SeriesClay Alexander Erler Marcelo Demoliner Andrea Vavassori4–6, 6–3, [10–12]Win4–1Bavarian Championships, Germany250 SeriesClay Alexander Erler Kevin Krawietz Tim Pütz6–3, 6–4Win5–1Austrian Open Kitzbühel, Austria 250 SeriesClay Alexander Erler Gonzalo Escobar Aleksandr Nedovyesov 6–4, 6–4Loss5–2Rio Open, Brazil500 SeriesClay Alexander Erler Nicolás Barrientos Rafael Matos4–6, 3–6Loss5–3Grand Prix Hassan II,Morocco 250 SeriesClay Alexander Erler Harri Heliövaara Henry Patten6–3, 4–6, [4–10]Win6–3European Open,Belgium250 SeriesHard (i) Alexander Erler Robert Galloway Aleksandr Nedovyesov6–4, 1–6, [10–8]Win7–3Vienna Open, Austria 500 SeriesHard (i) Alexander Erler Neal Skupski Michael Venus4–6, 6–3, [10–1]Win8–3Swiss Open Gstaad,Switzerland250 SeriesClay Francisco Cabral Hendrik Jebens Albano Olivetti6–7(4–7), 7–6(7–4), [10–3]Loss8–4Winston-Salem Open,United States250 SeriesHard Francisco Cabral Rafael Matos Marcelo Melo6–4, 4–6, [8–10]Win9–4Hangzhou Open,China250 SeriesHard Francisco Cabral Nicolás Barrientos David Pel6–4, 6–4Loss9–5Vienna Open, Austria500 SeriesHard (i) Francisco Cabral Julian Cash Lloyd Glasspool1–6, 6–7(6–8)Win10–5Hellenic Championship,Greece250 SeriesHard (i) Francisco Cabral Santiago González David Pel4–6, 6–3, [10–3]Win11–5Brisbane International,Australia250 SeriesHard Francisco Cabral Julian Cash Lloyd Glasspool6–3, 3–6, [10–8]Win12–5Swiss Open Gstaad,Switzerland 250 SeriesClay Marc Polmans Marcelo Demoliner Robert Galloway6–4, 6–3Win13–5Austrian Open Kitzbühel, Austria 250 SeriesClay Marc Polmans Jakob Schnaitter Mark Wallner6–2, 6–2
ATP Challenger finals
Singles: 1 (1 runner-up) ResultW–LDateTournamentSurfaceOpponentScoreLoss0–1Winnipeg, CanadaHard Jason Kubler1–6, 1–6
Doubles: 23 (12 titles, 11 runner-ups) Finals by surfaceHard (5–3)Clay (7–8)
ResultW–LDateTournamentSurfacePartnerOpponentsScoreLoss0–1Fano, ItalyClay Mark Vervoort Riccardo Ghedin Alessandro Motti4–6, 4–6Loss0–2Shymkent, KazakhstanClay Sebastian Ofner Lorenzo Giustino Gonçalo Oliveira2–6, 6–7(4–7)Loss0–3Portorož, SloveniaHard Nikola Čačić Gerard Granollers Pujol Lukáš Rosol5–7, 3–6Win1–3León, MexicoHard Sebastian Ofner Matt Reid John-Patrick Smith4–6, 6–4, [10–6]Loss1–4Portorož, SloveniaHard Sam Weissborn Carlos Gómez-Herrera Teymuraz Gabashvili3–6, 2–6Loss1–5Sibiu, RomaniaClay Alexander Erler James Cerretani Luca Margaroli3–6, 1–6Loss1–6Ortisei, ItalyHard (i) Alexander Erler Antonio Šančić Sam Weissborn6-7(8–10), 6–4, [8-10]Win2–6Helsinki, FinlandHard (i) Alexander Erler Harri Heliövaara Jean-Julien Rojer6–3, 7–6(7–2)Win3–6Forlì, ItalyHard (i) Alexander Erler Marco Bortolotti Sergio Martos Gornés6-4, 6–2Win4–6Ostrava, Czech RepublicClay Alexander Erler Hunter Reese Sem Verbeek7–6(7–5), 7–5Loss4–7Tunis, TunisiaClay Alexander Erler Nicolás Barrientos Miguel Ángel Reyes-Varela7-6(7–3), 3–6, [9-11]Loss4–8Salzburg, AustriaClay Alexander Erler Nathaniel Lammons Jackson Withrow 5–7, 7–5, [9-11]Win5–8Tampere, FinlandClay Alexander Erler Karol Drzewiecki Patrik Niklas-Salminen7–6(7–3), 6–1Win6–8Como, ItalyClay Alexander Erler Dustin Brown Julian Lenz6–1, 7–6(7–3)Win7–8Tulln an der Donau, AustriaClay Alexander Erler Zdeněk Kolář Denys Molchanov6–3, 6–4Loss7–9Sibiu, RomaniaClay Alexander Erler Ivan Sabanov Matej Sabanov6–3, 5–7, [4–10]Win8–9Cagliari, ItalyClay Alexander Erler Máximo González Andrés Molteni 7–6(8–6), 6–3Win9–9Shenzhen, ChinaHard Alexander Erler Piotr Matuszewski Matthew Romios 6–3, 6–4Win10–9Lyon, FranceHard (i) Luke Johnson Sergio Martos Gornés David Pichler 6–1, 6–2Win11–9Madrid, SpainClay Francisco Cabral Jakub Paul David Pel7–6(7–2), 6–4Loss11–10Oeiras, PortugalClay Francisco Cabral Karol Drzewiecki Piotr Matuszewski4–6, 6–3, [8–10]Loss11–11Estoril, PortugalClay Francisco Cabral Ariel Behar Joran Vliegen5–7, 3–6Win12–11Bordeaux, FranceClay Francisco Cabral Yuki Bhambri Robert Galloway7–6(7–1), 7–6(7–2)
ITF Futures/World Tennis Tour finals
Singles: 23 (10–13) ResultW–LDateTournamentSurfaceOpponentScoreLoss0–1Turkey F17, AntalyaHard Peter Heller3–6, 6–1, 3–6Loss0–2Turkey F18, AntalyaHard Riccardo Bellotti3–6, 4–6Loss0–3Slovenia F1, MariborClay Kirill Dmitriev4–6, 1–6Loss0–4Austria F9, PörtschachClay Bastian Trinker4–6, 3–6Win1–4South Africa F2, StellenboschHard Lloyd Harris7–6(7–4), 6–1Loss1–5South Africa F3, StellenboschHard Lloyd Harris2–6, 1–6Loss1–6Norway F1, OsloHard (i) Lorenzo Frigerio6–4, 3–6, 3–6Win2–6Norway F2, OsloHard (i) Gianluigi Quinzi6–2, 6–4Win3–6Cyprus F1, NicosiaHard David Poljak6–3, 6–3Loss3–7Cyprus F2, LimassolHard Alexandre Müller2–6, 2–6Loss3–8Cyprus F3, LarnacaHard Maximilian Neuchrist6–7(3–7), 3–6Loss3–9Portugal F2, FaroHard Yannick Mertens4–6, 2–6Win4–9Qatar F3, DohaHard Jonas Merckx6–3, 6–3Loss4–10Tunisia F24, HammametClay Sergio Gutiérrez Ferrol5–7, 4–6Win5–10Egypt F6, Sharm El SheikhHard Lloyd Harris6–3, 0–6, 6–2Win6–10Egypt F8, Sharm El SheikhHard Karim-Mohamed Maamoun6–3, 6–4Win7–10Egypt F11, Sharm El SheikhHard Teymuraz Gabashvili6–3, 7–5Loss7–11Egypt F12, Sharm El SheikhHard Teymuraz Gabashvili2–6, 3–6Loss7–12Egypt F13, Sharm El SheikhHard Andrés Artuñedo6–0, 6–7(7–9), 3–6Win8–12Spain F16, Palma del RíoHard Viktor Durasovic6–2, 7–6(8–6)Win9–12M15 Anif, AustriaClay Peter Heller6–1, 7–5Win10–12M15 Sharm El Sheikh, EgyptHard Makoto Ochi6–3, 7–6(7–3)Loss10–13M25 Loule, PortugalHard Fábián Marozsán7–6(8–6), 1–6, 3–6
Doubles: 45 (30–15)