William Thulin
2025
| J30Waterford | [1] | 2R |
| J30Dublin-2 | [2] | Win |
| J60Telde | [6] | 1R |
| J100Loughborough | 1R | |
| J30Liverpool-2 | [3] | 2R |
| J60Offenbach | 1R |
2024
| J60Emmeloord | [6] | Quarter |
| J30Aizkraukle | [4] | Win |
| J60Dijon | 2R | |
| J100Clermont-Ferrand | 1R | |
| J60Schifflange | 1R | |
| J60Naas | [7] | 2R |
| J30Edinburgh | [6] | Final |
| J60Edinburgh | 2R | |
| J30Limassol | 2R | |
| J30Dublin-2 | 1R | |
| J30Tallinn | 2R | |
| J30Tartu | Quarter | |
| J30Dublin | 1R | |
| J30Maribor | 1R |
2023
Nation
DEN
Generation
Born in 2009 (15-16 years old)
World Ranking
Junior World Ranking 611th
Year-end Junior World Ranking
- Year-end 2024 959th
- Year-end 2023 2235th
Match Details
2025 J30Waterford
| W | 1R | Hugh Murphy | 6-2 6-2 |
| L | 2R | Andrew Cutocheras | 3-2 |
2025 J30Dublin-2
| W | 1R | Jack Seaborn | 6-2 6-4 |
| W | 2R | Oliver Hradilek | 6-7 6-1 6-2 |
| W | QF | Matej Sedlaty | 7-5 6-4 |
| W | SF | Dylan Kazlauskas | 6-2 6-1 |
| W | F | Jan Froehlich | 6-2 6-1 |
2025 J60Telde
| L | 1R | Matias Reyniak | 2-6 2-6 |
2025 J100Loughborough
| L | 1R | Liam Channon | 3-6 2-6 |
2025 J30Liverpool-2
| W | 1R | Kouros Anssarizadeh | 6-4 7-6 |
| L | 2R | Mathias Lescano-Vecchi | 0-1 |
2025 J60Offenbach
| L | 1R | Tim Hohmann | 2-6 2-6 |
2024 J60Emmeloord
| W | 1R | Oscar Reilly | 3-6 5-4 |
| W | 2R | Thom Koppelle | 7-5 6-3 |
| L | QF | Aaron Gabet | 5-7 0-6 |
2024 J30Aizkraukle
| W | 1R | Kirils Sokolovs | 6-0 6-2 |
| W | 2R | Robin Lucas Sirk | 6-4 7-5 |
| W | QF | Augustas Geciauskas | 6-4 3-6 6-3 |
| W | SF | Armands Aire | 6-4 6-2 |
| W | F | Danila Folkheims | 4-6 7-6 6-3 |
2024 J60Dijon
| W | 1R | Louis Collos | 6-2 6-3 |
| L | 2R | Matthew Upton | 0-6 1-6 |
2024 J100Clermont-Ferrand
| L | 1R | Isaac Lhomond | 1-6 0-6 |
2024 J60Schifflange
| L | 1R | Roberto Perez Socas | 3-6 4-6 |
2024 J60Naas
| W | 1R | Hugh Murphy | 6-0 6-1 |
| L | 2R | William Moxon | 4-6 3-6 |
2024 J30Edinburgh
| W | 1R | Matthew Ground | 7-6 6-1 |
| W | 2R | Jack Berry | 7-6 6-0 |
| W | QF | Leo Wright | 7-6 2-6 6-0 |
| W | SF | Alexander English | 6-1 6-4 |
| L | F | Arthur Attrill | 1-6 1-6 |
2024 J60Edinburgh
| W | 1R | Thomas Dixon | 6-7 6-1 6-2 |
| L | 2R | Louis Hull | 3-6 4-6 |
2024 J30Limassol
| W | 1R | Jan Nowacki | 6-3 6-2 |
| L | 2R | Max Geissinger | 1-6 3-6 |
2024 J30Dublin-2
| L | 1R | Goncalo Quintela | 6-3 2-6 1-6 |
2024 J30Tallinn
| W | 1R | Aleksandrs Sotikovs | 3-6 6-2 6-4 |
| L | 2R | Sten Hiiesalu | 6-1 0-6 0-6 |
2024 J30Tartu
| W | 1R | Indrek Herman Raudkivi | 6-2 7-5 |
| W | 2R | Niklas Korsstrom | 7-6 6-2 |
| L | QF | Sten Hiiesalu | 2-6 1-6 |
2024 J30Dublin
| L | 1R | Sean O Nuallain | 2-6 2-6 |
2024 J30Maribor
| L | 1R | Jure Siftar | 4-6 6-7 |
2023 J30Tallinn
| W | 1R | Robert Raag | 6-4 6-3 |
| L | 2R | Michael Savano | 1-6 3-6 |
2023 J30Paralimni
| L | 1R | Filippo Alfano | 7-5 1-6 0-1 |
2023 J60Tirana-2
| W | 1R | Lorenzo De Vizia | 2-6 6-2 6-3 |
| L | 2R | Patrik Munkhammar | 1-6 1-6 |
2023 J60Hannover
| L | 1R | Bengt Johan Reinhard | 2-6 2-6 |
2023 J100Moenchengladbach
| L | 1R | Tim Kohl | 4-6 0-3 |
2023 J60Schifflange
| W | 1R | Patrik Hinz | 6-4 6-3 |
| L | 2R | Patrick Marsh | 6-7 1-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 5778, Number of registered players: 4,878, Number of registered results: 222,189