Jan Kobierski
2022
| J2Cairo | [3] | Quarter |
| J1Bytom | [9] | 2R |
| Jb1Klosters | 3R | |
| J2Bruchkoebel | [7] | 3R |
| J2Gladbeck | Quarter | |
| J1Bamberg | 1R | |
| Jaoffenbach | 2R | |
| J1Beaulieu-Sur-Mer | 2R | |
| J2Istres | [8] | 1R |
| J2Capdail | [5] | Semi |
| J1Vrsar | 1R | |
| J1Villena | 2R | |
| J1Casablanca | 1R | |
| J2Valencia | [7] | Quarter |
| J2Siauliai | 2R | |
| Australian Open Junior | 1R | |
| J1Traralgon | 1R |
2021
| J2Oberpullendorf | 1R | |
| J3Ramathasharon | [8] | 2R |
| J4Larnaca | [1] | Quarter |
| J4Cairo-2 | 2R | |
| J5Cairo | [4] | Win |
| J4Antalya | 1R | |
| J5Giza | [4] | Final |
| J4Ramathasharon | [4] | Quarter |
| J4Frankfurt | 2R |
Nation
AUT
World Ranking
ATP Ranking　1408th
Year-end Junior World Ranking
- Year-end 2022 163th
- Year-end 2021 136th
- Year-end 2020 484th
- Year-end 2019 1991th
Match Details
2022 J2Cairo
| W | 1R | Venedikt Tsirikidze | 2-6 7-5 7-5 |
| W | 2R | Daniel Khazime | 4-6 7-6 6-4 |
| L | QF | Ahmed Zaki | 4-6 2-6 |
2022 J1Bytom
| L | 2R | Sergio Callejon Hernando | 4-6 3-6 |
2022 Jb1Klosters
| W | 2R | Abel Forger | 6-2 0-6 6-4 |
| L | 3R | Alexander Blockx | 1-6 1-6 |
2022 J2Bruchkoebel
| W | 2R | Max Schoenhaus | 6-3 3-6 6-4 |
| L | 3R | Iliyan Radulov | 1-6 2-6 |
2022 J2Gladbeck
| W | 1R | Valentin Basel | 2-6 6-3 6-3 |
| W | 2R | Alejandro Bancalari | 6-1 6-7 6-1 |
| L | QF | Gianluca Ballotta | 6-7 2-6 |
2022 J1Bamberg
| L | 1R | Daniel Verbeek | 1-6 1-6 |
2022 Jaoffenbach
| W | 1R | Yannik Kelm | 6-2 6-2 |
| L | 2R | Gabriel Debru | 3-6 3-6 |
2022 J1Beaulieu-Sur-Mer
| W | 1R | Jaden Weekes | 6-1 7-6 |
| L | 2R | Lennon Roark Jones | 4-6 4-6 |
2022 J2Istres
| L | 1R | Thomas Faurel | 6-7 3-6 |
2022 J2Capdail
| W | 1R | Lucio Ratti | 6-2 7-6 |
| W | 2R | Igor Mandou Berranger | 6-1 6-0 |
| W | QF | Massimo Giunta | 6-4 6-1 |
| L | SF | Rei Sakamoto | 3-6 5-7 |
2022 J1Vrsar
| L | 1R | Federico Bondioli | 4-6 1-6 |
2022 J1Villena
| W | 1R | Joan Torres Espinosa | 4-0 5-44 |
| L | 2R | Jeremy Jin | 1-4 0-4 |
2022 J1Casablanca
| L | 1R | Andrea Mchich | 6-1 0-6 4-6 |
2022 J2Valencia
| W | 1R | Maximilian Wuelfing | 6-7 6-2 6-2 |
| W | 2R | Rafael Segado Esteve | 6-3 6-2 |
| L | QF | Pedro Rodenas | 1-6 4-6 |
2022 J2Siauliai
| W | 1R | Pijus Reklevicius | 6-4 7-6 |
| L | 2R | Jakub Nicod | 3-6 0-6 |
2022 Australian Open Junior
| L | 1R | Jakub Mensik | 2-6 4-6 |
2022 J1Traralgon
| L | 1R | Edas Butvilas | 0-6 0-6 |
2021 J2Oberpullendorf
| L | 1R | Mehdi Sadaoui | 4-6 6-7 |
2021 J3Ramathasharon
| W | 1R | Ori Baron | 5-7 6-4 6-2 |
| L | 2R | Jaden Weekes | 1-6 4-6 |
2021 J4Larnaca
| W | 1R | Stavros Hadjivarnava | 6-0 6-3 |
| W | 2R | Andrea Meduri | 7-6 7-5 |
| L | QF | Stylianos Christodoulou | 7-6 2-6 2-6 |
2021 J4Cairo-2
| W | 1R | Till Brunner | 7-5 6-1 |
| L | 2R | Karim Ibrahim | 6-7 0-6 |
2021 J5Cairo
| W | 1R | Joshua Nuyts | 6-1 6-3 |
| W | 2R | Aleksa Pisaric | 6-2 6-4 |
| W | QF | He Ziheng | 6-1 7-5 |
| W | SF | Hady El Kordy | 7-5 4-6 7-6 |
| W | F | Ye Hongyu | 6-1 6-1 |
2021 J4Antalya
| L | 1R | Pedro Rodenas | 3-6 4-6 |
2021 J5Giza
| W | 1R | Grigory Shebekin | 6-3 6-3 |
| W | 2R | Zyad Hamed | 6-2 7-6 |
| W | QF | He Ziheng | 6-0 6-3 |
| W | SF | Georgios Nouchakis | 6-3 6-3 |
| L | F | Borys Zgola | 7-6 3-6 0-6 |
2021 J4Ramathasharon
| W | 1R | Oryan Zohar | 6-1 6-4 |
| W | 2R | Itay Feigin | 6-3 3-6 6-0 |
| L | QF | Shay Bar Menahem | 4-6 2-6 |
2021 J4Frankfurt
| W | 1R | Oliver Olsson | 6-3 6-3 |
| L | 2R | Neo Niedner | 0-6 2-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 9168, Number of registered players: 5,582, Number of registered results: 289,147