Niels Ratiu
2023
| J300Charleroi-Marcinelle | Quarter | |
| J200Villach | 2R | |
| J200Istres | 2R | |
| J500Criciuma | 2R | |
| J300Portoalegre | 1R | |
| J300Asuncion | 1R | |
| J100Glasgow | [1] | Semi |
2022
| Jamerida | 1R | |
| J1Guadalajara | 2R | |
| J2Shymkent | [11] | Quarter |
| J2Istanbul | 1R | |
| J1Prague | 3R | |
| J1Bytom | 2R | |
| J3Poznan | 2R | |
| J3Neunkirchen | [13] | 2R |
| J1Charleroi-Marcinelle | 1R | |
| J2Villach | 2R | |
| J5Hasselt | [4] | Semi |
| J3Mohammedia | Quarter | |
| J5Dakar-2 | [5] | Quarter |
| J5Dakar | [4] | Semi |
| J2Hammamsousse | 1R | |
| J2Hammamet | 1R | |
| J4Arlon | 2R |
2021
Nation
BEL
World Ranking
ATP Ranking　1475th
Year-end Junior World Ranking
- Year-end 2023 160th
- Year-end 2022 226th
- Year-end 2021 1077th
Match Details
2023 J300Charleroi-Marcinelle
| W | 1R | Karim Bennani | 3-6 7-6 6-1 |
| W | 2R | Yuvan Nandal | 6-1 5-2 |
| W | 3R | Stiles Brockett | 6-4 5-7 6-3 |
| L | QF | Lasse Poertner | 5-7 3-6 |
2023 J200Villach
| W | 1R | Nico Hipfl | 6-3 6-1 |
| L | 2R | Keegan Rice | 6-3 5-7 6-7 |
2023 J200Istres
| W | 1R | Aaron Funk | 6-0 7-6 |
| L | 2R | Paul Barbier Gazeu | 4-6 6-7 |
2023 J500Criciuma
| W | 1R | Mateus Yakasilo | 6-0 6-1 |
| L | 2R | Federico Cina | 6-2 1-6 4-6 |
2023 J300Portoalegre
| L | 1R | Adriano Dzhenev | 5-7 6-3 1-6 |
2023 J300Asuncion
| L | 1R | Maxwell Exsted | 3-6 5-7 |
2023 J100Glasgow
| W | 1R | Conor Brady | 6-1 6-3 |
| W | 2R | Alan Wazny | 6-3 6-3 |
| W | QF | Henry Jefferson | 7-6 7-6 |
| L | SF | Charlie Robertson | 6-7 2-6 |
2022 Jamerida
| L | 1R | Rodrigo Pacheco Mendez | 2-6 2-6 |
2022 J1Guadalajara
| W | 1R | Jose Maria Garcia Uribe | 6-0 6-1 |
| L | 2R | Patrick Schoen | 7-6 3-6 3-6 |
2022 J2Shymkent
| W | 2R | Amirkhamza Nasridinov | 6-2 6-4 |
| W | 3R | Islam Orynbasar | 7-5 7-6 |
| L | QF | Filip Apltauer | 6-2 1-6 3-6 |
2022 J2Istanbul
| L | 1R | Vuk Radjenovic | 6-4 5-7 1-6 |
2022 J1Prague
| W | 1R | Krystof Svojgr | 6-2 6-3 |
| W | 2R | Filip Apltauer | 6-3 6-4 |
| L | 3R | Samuel Kyjaci | 7-6 4-6 4-6 |
2022 J1Bytom
| W | 1R | Luka Novakovic | 6-4 6-2 |
| L | 2R | Maciej Kos | 3-6 4-6 |
2022 J3Poznan
| W | 1R | Nikodem Barcik | 6-7 7-5 6-4 |
| L | 2R | Fadi Bidan | 6-7 6-3 6-7 |
2022 J3Neunkirchen
| L | 2R | Max Schoenhaus | 0-6 6-4 3-6 |
2022 J1Charleroi-Marcinelle
| L | 1R | Peter Buldorini | 3-6 6-4 2-6 |
2022 J2Villach
| W | 1R | Joel Schwaerzler | 6-7 6-3 6-3 |
| L | 2R | Mihai Alexandru Coman | 2-6 6-4 3-6 |
2022 J5Hasselt
| W | 2R | Lukas Gruben | 7-5 3-6 6-4 |
| W | 3R | Nicolas Trebuchet | 4-6 6-4 6-2 |
| W | QF | Ethan Khun | 6-2 6-2 |
| L | SF | Felipe Virgili Berini | 2-6 1-6 |
2022 J3Mohammedia
| W | 1R | Matteo Covato | 5-7 6-0 7-6 |
| W | 2R | Loan Lestir | 2-6 6-2 6-4 |
| L | QF | Vit Kalina | 3-6 7-5 4-6 |
2022 J5Dakar-2
| W | 1R | Zoheir Fardoun | 6-1 6-2 |
| W | 2R | Zakaria Achour | 6-2 6-2 |
| L | QF | Jelani Sarr | 3-6 5-7 |
2022 J5Dakar
| W | 1R | Nathan Trouve | 6-0 6-7 6-2 |
| W | 2R | Ahmed Elkarmoty | 6-2 6-1 |
| W | QF | Timeo Gaillard | 6-0 6-1 |
| L | SF | Thomas Faurel | 3-6 3-6 |
2022 J2Hammamsousse
| L | 1R | Anro Nel | 4-6 7-5 3-6 |
2022 J2Hammamet
| L | 1R | Tiago Silva | 3-6 5-7 |
2022 J4Arlon
| W | 1R | Julien Imbert | 6-2 6-2 |
| L | 2R | Gianluca Cadenasso | 6-2 3-6 6-7 |
2021 J5Heiveld-2
| W | 1R | Gur Trakhtenberg | 7-5 6-1 |
| L | 2R | Harold Van Raemdonck | 3-6 6-4 2-6 |
2021 J4Maaseik
| L | 1R | Gur Trakhtenberg | 6-4 5-7 3-6 |
2021 J5Bree
| L | 1R | Sergej Topic | 6-0 3-6 3-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 9280, Number of registered players: 5,767, Number of registered results: 305,685