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 |
| J2 SANTODOMINGO-3 | [14] | 1R |
| J1 KAZAN-2 | 2R | |
| J2 CHISINAU | [7] | Semi |
| J1 SVIATOPETRIVSKEVILLAGE | [8] | 2R |
| J1 PRAGUEWEST | [9] | 2R |
Nation
POL
World Ranking
ATP Ranking　1247th
Year-end Junior World Ranking
- Year-end 2020 120th
- Year-end 2019 229th
Match Details
2020 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 |
2020 J3 SOBOTA-3
| W | 1R | Ainius Sabaliauskas | 6-1 7-6 |
| L | 2R | Vojtech Petr | 3-6 0-3 |
2020 J1 PLOVDIV-2
| L | 1R | Bruno Kuzuhara | 3-6 7-6 0-6 |
2020 J2 ORADEA-2
| W | 1R | Mihnea Petru Zaharia | 6-0 6-2 |
| L | 2R | Calin Postea | 3-6 4-6 |
2020 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 |
2020 J2 BYTOM
| L | 1R | Frederic Vogeli | 6-2 2-6 2-6 |
2020 J2 RAKOVNIK-2
| W | 1R | Ondrej Horak | 6-4 7-5 |
| L | 2R | Mili Poljicak | 2-6 6-3 3-6 |
2020 J2 SANTODOMINGO-3
| L | 1R | Kian Vakili | 6-7 6-4 3-6 |
2020 J1 KAZAN-2
| W | 1R | Robert Korelov | 6-1 6-4 |
| L | 2R | Egor Agafonov | 6-3 5-7 3-6 |
2020 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 |
2020 J1 SVIATOPETRIVSKEVILLAGE
| W | 1R | Mark Lajal | 7-6 0-6 7-5 |
| L | 2R | Noah Lopez | 3-6 3-6 |
2020 J1 PRAGUEWEST
| L | 2R | Jip Van Assendelft | 6-7 2-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 10086, Number of registered players: 6,405, Number of registered results: 370,423