Szymon Kielan
2020
| J4 ARLON | [1] | Final |
| J3 SOBOTA-3 | [1] | 2R |
| J1 PLOVDIV-2 | 1R | |
| J2 ORADEA-2 | [2] | 2R |
| J4 SOBOTA | [1] | Win |
| J2 BYTOM | [5] | 1R |
| J2 RAKOVNIK-2 | [4] | 2R |
| J1 KAZAN-2 | 2R | |
| J2 CHISINAU | [7] | Semi |
| J1 SVIATOPETRIVSKEVILLAGE | [8] | 2R |
| J1 PRAGUEWEST | [9] | 2R |
2019
| J4 ARLON | [1] | Final |
| J4 ARLON-2 | [1] | Final |
| J3 LIEPAJA | [7] | 1R |
| J4 LIVERPOOL | [1] | Win |
| J2 CHUNCHEON | 1R | |
| J2 NAGOYA | 2R | |
| JAOSAKA | 1R | |
| J2 PRAGUE | [14] | 3R |
| J3 KYIVREGION | [3] | Quarter |
| J3 KRAKOW | [8] | 1R |
| J3 LVIV | 1R | |
| J4 TALLINN | [1] | Semi |
| J2 BYTOM | 2R | |
| J4 TBILISI | [3] | 1R |
| J3 TALLINN | 1R | |
| J3 MEGRINE | [6] | Quarter |
| J3 TRNAVA | [11] | Quarter |
| J5 WARSAW | [3] | Win |
| J4 SZCZECIN | [8] | Win |
| J2 SVIATOPETRIVSKEVILLAGE | 1R |
2018
| J5 ARLON | [1] | Semi |
| J4 BUDAPEST | 2R |
Nation
POL
World Ranking
ATP Ranking　1248th
Year-end Junior World Ranking
- Year-end 2020 120th
- Year-end 2019 229th
Rival
maikel de boes (0-3)
sascha gueymard wayenburg (3-0)
noah merre (3-0)
lars goran verwerft (3-0)
leon berg (3-0)
Match Details
J4 ARLON
| W | 1R | Leon Berg | 6-2 6-3 |
| W | 2R | Lars Goran Verwerft | 6-2 6-1 |
| W | QF | Noah Merre | 4-6 7-6 7-6 |
| W | SF | Sascha Gueymard Wayenburg | 7-6 1-6 7-6 |
| L | F | Maikel De Boes | 6-3 1-6 4-6 |
J3 SOBOTA-3
| W | 1R | Ainius Sabaliauskas | 6-1 7-6 |
| L | 2R | Vojtech Petr | 3-6 0-3 |
J1 PLOVDIV-2
| L | 1R | Bruno Kuzuhara | 3-6 7-6 0-6 |
J2 ORADEA-2
| W | 1R | Mihnea Petru Zaharia | 6-0 6-2 |
| L | 2R | Calin Postea | 3-6 4-6 |
J4 SOBOTA
| W | 1R | Fryderyk Lechno-Wasiutynski | 6-2 6-1 |
| W | 2R | Alessio Vasquez | 4-6 6-4 6-2 |
| W | QF | Borys Zgola | 6-2 6-4 |
| W | SF | Idriss Haddouch | 6-4 7-6 |
| W | F | Martyn Pawelski | 7-5 7-6 |
J2 BYTOM
| L | 1R | Frederic Vogeli | 6-2 2-6 2-6 |
J2 RAKOVNIK-2
| W | 1R | Ondrej Horak | 6-4 7-5 |
| L | 2R | Mili Poljicak | 2-6 6-3 3-6 |
J1 KAZAN-2
| W | 1R | Robert Korelov | 6-1 6-4 |
| L | 2R | Egor Agafonov | 6-3 5-7 3-6 |
J2 CHISINAU
| W | 1R | Samuil Konov | 6-3 7-5 |
| W | 2R | German Samofalov | 6-3 7-5 |
| W | QF | Ilya Lebedev | 6-3 6-3 |
| L | SF | Romain Faucon | 2-6 2-6 |
J1 SVIATOPETRIVSKEVILLAGE
| W | 1R | Mark Lajal | 7-6 0-6 7-5 |
| L | 2R | Noah Lopez | 3-6 3-6 |
J1 PRAGUEWEST
| L | 2R | Jip Van Assendelft | 6-7 2-6 |
J4 ARLON-2
| W | 1R | Leon Berg | 6-2 6-3 |
| W | 2R | Lars Goran Verwerft | 6-2 6-1 |
| W | QF | Noah Merre | 4-6 7-6 7-6 |
| W | SF | Sascha Gueymard Wayenburg | 7-6 1-6 7-6 |
| L | F | Maikel De Boes | 6-3 1-6 4-6 |
J4 ARLON
| W | 1R | Leon Berg | 6-2 6-3 |
| W | 2R | Lars Goran Verwerft | 6-2 6-1 |
| W | QF | Noah Merre | 4-6 7-6 7-6 |
| W | SF | Sascha Gueymard Wayenburg | 7-6 1-6 7-6 |
| L | F | Maikel De Boes | 6-3 1-6 4-6 |
J3 LIEPAJA
| L | 1R | Oskar Brostrom Poulsen | 3-6 6-4 4-6 |
J4 LIVERPOOL
| W | 1R | Harry Lazell | 6-0 6-4 |
| W | 2R | Luca Mcmanus | 6-4 6-4 |
| W | QF | Samuel Reeve | 6-3 6-3 |
| W | SF | Luca Van Assche | 6-3 0-6 7-5 |
| W | F | Mathis Debru | 6-3 6-2 |
J2 CHUNCHEON
| L | 1R | Hanwen Li | 5-7 1-6 |
J2 NAGOYA
| W | 1R | Geni Inoue | 6-3 6-4 |
| L | 2R | Hamad Medjedovic | 0-6 3-6 |
JAOSAKA
| L | 1R | Shunsuke Mitsui | 4-6 4-6 |
J2 PRAGUE
| W | 2R | Martin Benes | 7-5 6-2 |
| L | 3R | Pablo Alemany | 1-6 1-6 |
J3 KYIVREGION
| W | 1R | Gleb Baklanov | 6-4 7-6 |
| W | 2R | Svyatoslav Gulin | 6-4 6-3 |
| L | QF | Alberto Orso | 5-7 5-7 |
J3 KRAKOW
| L | 1R | Matas Vasiliauskas | 6-3 0-6 2-5 |
J3 LVIV
| L | 1R | Yevhenii Bondarenko | 1-6 6-1 6-7 |
J4 TALLINN
| W | 1R | Vilius Gaubas | 6-4 6-1 |
| W | 2R | Roberts Jaricevskis | 6-1 6-4 |
| W | QF | Petr Bar Biryukov | 6-2 6-3 |
| L | SF | Leo Raquin | 0-6 2-6 |
J2 BYTOM
| W | 1R | Ilya Tiraspolsky | 6-2 6-1 |
| L | 2R | Giovanni Mpetshi Perricard | 5-7 2-6 |
J4 TBILISI
| L | 1R | Kyle Lok Yin Tang | 2-6 6-3 5-7 |
J3 TALLINN
| L | 1R | Petr Bar Biryukov | 6-4 1-6 2-6 |
J3 MEGRINE
| W | 1R | Aziz Helali | 6-4 7-5 |
| W | 2R | Habib Stambouli | 7-6 4-6 6-1 |
| L | QF | Baptiste Anselmo | 4-6 2-6 |
J3 TRNAVA
| W | 2R | Mile Matic | 7-5 7-6 |
| W | 3R | Tomas Lanik | 6-2 6-2 |
| L | QF | Jiri Barnat | 5-7 7-6 6-7 |
J5 WARSAW
| W | 1R | Mikhail Gorokhov | 6-1 6-4 |
| W | 2R | Pawel Kaliszewski | 6-4 7-6 |
| W | QF | Hugo Maia | 6-0 6-1 |
| W | SF | Marcel Kamrowski | 6-3 7-6 |
| W | F | Nino Ehrenschneider | 7-6 0-6 6-4 |
J4 SZCZECIN
| W | 1R | Mikhail Kniazeu | 1-6 6-3 6-2 |
| W | 2R | Nino Ehrenschneider | 6-3 7-6 |
| W | QF | Filip Pieczonka | 3-6 6-4 6-1 |
| W | SF | Wojciech Szczesny | 6-4 6-2 |
| W | F | Dawid Wisniewski | 6-3 6-4 |
J2 SVIATOPETRIVSKEVILLAGE
| L | 1R | Giovanni Mpetshi Perricard | 1-6 4-6 |
J5 ARLON
| W | 1R | Thibault Dorval | 6-2 6-4 |
| W | 2R | Alexander Gilisen | 6-3 6-2 |
| W | QF | Arthus De La Bassetiere | 6-2 6-2 |
| L | SF | Pierre Yves Bailly | 7-6 5-7 1-6 |
J4 BUDAPEST
| W | 1R | Mate Cseresznyes | 7-5 1-6 7-6 |
| L | 2R | Jaime Caldes | 6-4 2-6 2-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 14379, Number of registered players: 7,503, Number of registered results: 447,330