Naoki Tajima
2018
| US OPEN JUNIOR | [8] | 1R |
| J1 REPENTIGNY | [2] | 2R |
| WIMBLEDON JUNIOR | [8] | 1R |
| J1 ROEHAMPTON | [7] | Semi |
| ROLAND GARROS JUNIOR | 2R | |
| J1 CHARLEROI-MARCINELLE | [2] | Semi |
| J1 LAMBARE | [3] | Quarter |
| AUSTRALIAN OPEN JUNIOR | [15] | 1R |
| J1 TRARALGON | [15] | 3R |
2017
| J500OSAKA | [4] | Quarter |
| US OPEN JUNIOR | Quarter | |
| J1 REPENTIGNY | [14] | 3R |
| WIMBLEDON JUNIOR | 3R | |
| J1 ROEHAMPTON | 1R | |
| J1 BERLIN | [3] | 2R |
| J1 OFFENBACH | [6] | Quarter |
| ROLAND GARROS JUNIOR | 2R | |
| J1 CHARLEROI-MARCINELLE | [8] | Semi |
| J1 SANTACROCE | [14] | 3R |
| J3 CASABLANCA | [1] | Win |
| J1 CASABLANCA | [3] | 3R |
| J1 BEAULIEUSURMER | [4] | Quarter |
| J2 ISTRES | [1] | 1R |
| J1 SARAWAK | [3] | Quarter |
| J1 NONTHABURI | [3] | 2R |
| AUSTRALIAN OPEN JUNIOR | [8] | 1R |
| J1 TRARALGON | [9] | 2R |
2016
| J500OSAKA | [12] | 2R |
2015
| J500OSAKA | 2R |
2014
| J500OSAKA | 1R |
Nation
JPN
Age
25 years old (born in 2000)
World Ranking
ATP Ranking　1497th
Year-end Junior World Ranking
- Year-end 2018 17th
Match Details
US OPEN JUNIOR
| L | 1R | Jonas Forejtek | 1-6 3-6 |
J1 REPENTIGNY
| L | 2R | Jacob Fearnley | 6-3 3-6 1-6 |
WIMBLEDON JUNIOR
| L | 1R | Trey Hilderbrand | 7-6 6-7 1-6 |
J1 ROEHAMPTON
| W | 1R | Rinky Hijikata | 7-6 7-6 |
| W | 2R | Cannon Kingsley | 6-4 6-2 |
| W | 3R | Blu Baker | 6-1 6-3 |
| W | QF | Sebastian Korda | 6-4 7-5 |
| L | SF | Brandon Nakashima | 3-6 4-6 |
ROLAND GARROS JUNIOR
| W | 1R | Marko Miladinovic | 7-5 3-6 6-4 |
| L | 2R | Sebastian Baez | 6-3 2-6 2-6 |
J1 CHARLEROI-MARCINELLE
| W | 2R | Alexander Zgirovsky | 6-2 6-1 |
| W | 3R | Justin Boulais | 6-2 6-2 |
| W | QF | Gauthier Onclin | 6-1 7-5 |
| L | SF | Damien Wenger | 6-1 6-7 2-6 |
J1 LAMBARE
| W | 2R | Nathaniel Han | 6-7 6-2 6-2 |
| W | 3R | Agustin Riquelme Coppari | 3-6 6-0 6-3 |
| L | QF | Joao Lucas Reis Da Silva | 3-6 2-6 |
AUSTRALIAN OPEN JUNIOR
| L | 1R | Wojciech Marek | 3-6 4-6 |
J1 TRARALGON
| W | 1R | Christian Didier Chin | 6-2 6-2 |
| W | 2R | Duje Ajdukovic | 6-3 6-3 |
| L | 3R | Marko Miladinovic | 3-6 4-6 |
J500OSAKA
| W | 1R | George Davis | 6-2 6-2 |
| W | 2R | Yamato Sueoka | 6-4 6-4 |
| W | 3R | Dane Sweeny | 7-6 6-0 |
| L | QF | Erik Grevelius | WD |
US OPEN JUNIOR
| W | 1R | Michael Vrbensky | 5-7 6-4 6-2 |
| W | 2R | Hugo Gaston | 6-1 2-6 7-6 |
| W | 3R | Menelaos Efstathiou | 6-0 6-7 6-3 |
| L | QF | Axel Geller | 3-6 7-6 4-6 |
J1 REPENTIGNY
| W | 2R | Igor Gimenez | 6-3 6-3 |
| L | 3R | Duje Ajdukovic | 3-6 5-7 |
WIMBLEDON JUNIOR
| W | 1R | Max Stewart | 6-4 6-4 |
| W | 2R | Timofei Skatov | 7-6 6-3 |
| L | 3R | Axel Geller | 3-6 6-3 1-6 |
J1 ROEHAMPTON
| L | 1R | Timofey Skatov | 1-6 2-6 |
J1 BERLIN
| W | 1R | Moritz Hoffmann | 6-4 6-1 |
| L | 2R | Igor Gimenez | 1-6 3-6 |
J1 OFFENBACH
| W | 2R | Jeffrey Von Der Schulenburg | 6-0 6-2 |
| W | 3R | Karlo Kranic | 4-6 6-1 |
| L | QF | Rudolf Molleker | 6-7 2-6 |
ROLAND GARROS JUNIOR
| W | 1R | Louis Dussin | 6-2 6-2 |
| L | 2R | Nicola Kuhn | 7-6 2-6 4-6 |
J1 CHARLEROI-MARCINELLE
| W | 2R | Seonyong Han | 6-1 6-3 |
| W | 3R | Benard Bruno Nkomba | 6-0 6-0 |
| W | QF | Alberto Colas Sanchez | 6-4 6-2 |
| L | SF | Yuta Shimizu | 3-6 2-6 |
J1 SANTACROCE
| W | 2R | Mohamed Ali Bellalouna | 3-6 7-5 6-4 |
| L | 3R | Marko Miladinovic | 6-7 6-0 4-6 |
J3 CASABLANCA
| W | 1R | Anton Ornberg | 6-0 6-3 |
| W | 2R | Admir Kalender | 4-6 7-6 6-1 |
| W | QF | Facundo Diaz Acosta | 6-3 6-1 |
| W | SF | Filip Cristian Jianu | 7-5 7-5 |
| W | F | Tomas Descarrega | 6-2 6-2 |
J1 CASABLANCA
| W | 2R | Simon Yitbarek | 6-4 6-1 |
| L | 3R | Andrew Fenty | 0-6 0-6 |
J1 BEAULIEUSURMER
| W | 2R | Jesper De Jong | 6-3 6-4 |
| W | 3R | Baptiste Anselmo | 6-4 6-1 |
| L | QF | Alexey Zakharov | 1-6 6-2 4-6 |
J2 ISTRES
| L | 1R | Damien Wenger | 6-7 3-6 |
J1 SARAWAK
| W | 2R | Tonkla Mulada | 6-2 6-3 |
| W | 3R | Taisei Ichikawa | 6-2 4-6 7-5 |
| L | QF | Uisung Park | 5-7 3-4 |
J1 NONTHABURI
| L | 2R | Yunchaokete Bu | 3-6 5-7 |
AUSTRALIAN OPEN JUNIOR
| L | 1R | Federico Iannaccone | 6-0 5-7 2-6 |
J1 TRARALGON
| W | 1R | Menelaos Efstathiou | 5-7 6-3 1-0 |
| L | 2R | Benard Bruno Nkomba | 6-7 4-6 |
J500OSAKA
| W | 1R | Moerani Bouzige | 7-6 6-1 |
| L | 2R | John Bryan Decasa Otico | 4-6 6-7 |
J500OSAKA
| W | 1R | Damon Kesaris | 5-7 7-5 7-5 |
| L | 2R | Mate Valkusz | 0-6 2-6 |
J500OSAKA
| L | 1R | Eero Vasa | 2-6 2-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 14549, Number of registered players: 7,577, Number of registered results: 451,713