He has won seven doubles titles on the ATP Tour 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.

[1] 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.

[2] At the 2023 Australian Open the pair Miedler/Erler made their Grand Slam debut where they defeated tenth seeds Rohan Bopanna and Matthew Ebden.

[3] At the ATP 500 Mexican Open Miedler won his third title with compatriot Erler defeating en route top seeds Wesley Koolhof and Neal Skupski.

[citation needed] At the 2023 Grand Prix Hassan II the pair Miedler/Erler reached the final defeating fifth seeds Maxime Cressy and Albano Olivetti.