[1] Paul made his ATP main draw debut as a wildcard at the 2018 Swiss Open Gstaad in the doubles draw partnering Adrian Bodmer, together defeating fellow Swiss wildcards Marc-Andrea Hüsler and Luca Margaroli.

He entered the 2021 Swiss Open Gstaad also as a wildcard in the doubles draw partnering with Leandro Riedi.

They won their maiden doubles match as a team against Evan King and Max Schnur.

He also entered the 2022 Geneva Open as a wildcard with Riedi where they reached the quarterfinals defeating second seeds Jamie Murray and Bruno Soares.

He also received wildcards in doubles for the 2024 Geneva Open partnering Antoine Bellier and in singles for the qualifying competition.