Piotr Siekanowicz
2022
| J3 LESZNO-2 | Quarter | |
| J4 LESZNO-2 | [8] | 1R |
| J3 KRAKOW | 2R | |
| J3 POZNAN | 1R | |
| J4 FUERTH | [5] | 1R |
| J3 LOUGHBOROUGH-2 | Quarter | |
| J3 LOUGHBOROUGH | 2R | |
| J5 WARSAW | [1] | 2R |
| J4 SZCZECIN | [7] | Final |
| J4 PUSZCZYKOWO | Quarter | |
| J3 GLASGOW | [6] | Quarter |
2021
| J4 HAMBURG-2 | [3] | Quarter |
| J5 BIELSKO-BIALA | [2] | Win |
| J5 SZCZAWNOZDROJ | [4] | 1R |
| J5 PUSZCZYKOWO-3 | [6] | 2R |
| J3 KRAKOW | Quarter | |
| J3 POZNAN | 1R | |
| J4 GDANSK | Semi | |
| J5 PUSZCZYKOWO | 1R |
2020
| J5 KOLOBRZEG | Quarter |
Nation
POL
World Ranking
ATP Ranking　1986th
Year-end Junior World Ranking
- Year-end 2022 624th
- Year-end 2021 541th
- Year-end 2020 2059th
Match Details
2022 J3 LESZNO-2
| W | 1R | Marek Pazdera | 7-6 6-1 |
| W | 2R | Simon Knezevic | 6-2 6-4 |
| L | QF | Filip Stidell | 6-3 4-6 4-6 |
2022 J4 LESZNO-2
| L | 1R | William Rejchtman Vinciguerra | 6-2 3-6 3-6 |
2022 J3 KRAKOW
| W | 1R | Pijus Reklevicius | 7-6 6-4 |
| L | 2R | Kacper Szymkowiak | 0-6 1-6 |
2022 J3 POZNAN
| L | 1R | Emilien Demanet | 0-6 0-2 |
2022 J4 FUERTH
| L | 1R | Keegan Rice | 1-6 2-6 |
2022 J3 LOUGHBOROUGH-2
| W | 1R | Freddie Ridout | 6-2 6-3 |
| W | 2R | Charlie Robertson | 6-3 7-5 |
| L | QF | Benjamin Gusic Wan | 3-6 7-5 3-6 |
2022 J3 LOUGHBOROUGH
| W | 1R | Kyle Hughes | 6-1 4-6 6-2 |
| L | 2R | Luca Pow | 0-6 6-7 |
2022 J5 WARSAW
| W | 1R | Michal Curlej | 6-4 6-2 |
| L | 2R | Emil Matikainen | 5-7 0-6 |
2022 J4 SZCZECIN
| W | 1R | Daniels Tens | 6-2 4-6 6-2 |
| W | 2R | Igor Mandou Berranger | 6-3 6-7 6-2 |
| W | QF | Fryderyk Lechno-Wasiutynski | 5-7 6-2 6-3 |
| W | SF | Jakub Jedrzejczak | 6-2 6-4 |
| L | F | Gabriel Matuszewski | 3-6 4-6 |
2022 J4 PUSZCZYKOWO
| W | 1R | Kristian Janci | 6-4 6-4 |
| W | 2R | Adam Majchrzak | 7-6 6-7 6-4 |
| L | QF | Lukas Janousek | 2-6 1-4 |
2022 J3 GLASGOW
| W | 1R | Werner Zimmermann | 4-6 6-3 6-3 |
| W | 2R | Ben Hudson | 3-6 6-1 6-4 |
| L | QF | Hugo Coquelin | 5-7 3-6 |
2021 J4 HAMBURG-2
| W | 2R | Mika Petkovic | 7-6 6-4 |
| W | 3R | Karl Nagel-Heyer | 6-4 6-0 |
| L | QF | Bon Lou Karstens | 3-6 3-6 |
2021 J5 BIELSKO-BIALA
| W | 1R | Julius Augunas | 6-2 6-3 |
| W | 2R | Ales Hrdina | 6-0 6-0 |
| W | QF | Samuel Guzon | 6-1 6-0 |
| W | SF | Jakub Jedrzejczak | 7-6 3-6 6-2 |
| W | F | Matthias Uwe Kask | 6-1 7-6 |
2021 J5 SZCZAWNOZDROJ
| L | 1R | Bartlomiej Ros | 6-3 4-6 1-6 |
2021 J5 PUSZCZYKOWO-3
| W | 1R | Mika Petkovic | 6-3 6-3 |
| L | 2R | Filip Bojko | 6-7 1-3 |
2021 J3 KRAKOW
| W | 1R | Dominykas Stonkus | 6-3 6-2 |
| W | 2R | Valentin Basel | 6-2 6-3 |
| L | QF | Patryk Stokowski | 3-6 5-7 |
2021 J3 POZNAN
| L | 1R | Pijus Vaitiekunas | 6-4 4-6 3-6 |
2021 J4 GDANSK
| W | 1R | Max Stenzer | 6-4 3-6 6-3 |
| W | 2R | Patryk Stokowski | 4-6 6-1 6-4 |
| W | QF | Piotr Czaczkowski | 7-5 6-3 |
| L | SF | Maciej Kos | 3-6 4-6 |
2021 J5 PUSZCZYKOWO
| L | 1R | Rashed Nawaf | 2-6 3-6 |
2020 J5 KOLOBRZEG
| W | 1R | Jonah Gethin | 6-4 6-2 |
| W | 2R | Borys Zgola | 1-6 6-3 6-1 |
| L | QF | Sandro Szic | 3-6 7-6 1-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 10086, Number of registered players: 6,349, Number of registered results: 362,939