Naoki Tajima

Naoki Tajima
Country (sports)	Japan
Born	21 September 2000 (age 26); Kumamoto, Japan
Plays	Right-handed (two-handed backhand)
Prize money	$77,503
Singles
Career record	0–0
Career titles	0
Highest ranking	No. 603 (20 January 2020)
Current ranking	No. 1,419 (16 February 2026)
Grand Slam singles results
Australian Open Junior	1R (2018)
French Open Junior	2R (2018)
Wimbledon Junior	1R (2018)
US Open Junior	QF (2017)
Doubles
Career record	0–0
Career titles	0
Highest ranking	No. 245 (16 February 2026)
Current ranking	No. 245 (16 February 2026)
Grand Slam doubles results
Australian Open Junior	QF (2018)
French Open Junior	W (2018)
Wimbledon Junior	SF (2018)
	Last updated on: 16 February 2026.

Naoki Tajima (田島尚輝, Tajima Naoki; born 21 September 2000) is a Japanese tennis player.

Tajima has a career high ATP singles ranking of No. 603 achieved on 20 January 2021 and a doubles rankings of No. 245 achieved on 16 February 2026.

Tajima won the 2018 French Open – Boys' doubles title.

ATP Challenger and ITF Futures finals

Singles: 2 (0–2)

Legend
ATP Challenger (0–0)
ITF Futures (0–2)

Finals by surface
Hard (0–1)
Clay (0–1)
Grass (0–0)
Carpet (0–0)

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Loss	0–1	Jan 2019	M15 Anning, China	World Tennis Tour	Clay	Agustín Velotti	6–4, 3–6, 5–7
Loss	0–2	May 2021	M15 Kouvola, Finland	World Tennis Tour	Hard	Anton Matusevich	1–6, 6–4, 0–6

Doubles: 30 (8–22)

Legend
ATP Challenger (1–1)
World Tennis Tour (7–21)

Finals by surface
Hard (7–17)
Clay (1–5)
Grass (0–0)
Carpet (0–0)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Win	1–0	Jan 2019	M15 Anning, China	World Tennis Tour	Clay	Kento Takeuchi	Francesco Bessire Agustín Velotti	4–6, 7–5, [10–7]
Win	2–0	Apr 2019	M25 Matsuyama, Japan	World Tennis Tour	Hard	Shinji Hazawa	Cheong-Eui Kim Ji Sung Nam	4–6, 6–1, [10–7]
Loss	2–1	Jan 2021	M15 Cairo, Egypt	World Tennis Tour	Clay	Jose Francisco Vidal Azorin	Franco Agamenone Piotr Matuszewski	6–4, 6–7^(5–7), [7–10]
Loss	2–2	Apr 2021	M15 St. Petersburg, Russia	World Tennis Tour	Hard	Alexey Zakharov	Alexandr Cozbinov Simon Freund	4–6, 5–7
Loss	2–3	Apr 2021	M15 St. Petersburg, Russia	World Tennis Tour	Hard	Alexey Zakharov	Alexandr Cozbinov Simon Freund	6–7^5–7, 6–2, [6–10]
Loss	2–4	Oct 2021	M15 Cancún, Mexico	World Tennis Tour	Hard	Sho Shimabukuro	Siddhant Banthia Seita Watanabe	6–1, 4–6, [3–10]
Win	3–4	Oct 2021	M15 Cancún, Mexico	World Tennis Tour	Hard	Sho Shimabukuro	Peter Bertran Mwendwa Mbithi	7–6^(7–5), 6–4
Win	4–4	Jan 2022	M15 Monastir, Tunesia	World Tennis Tour	Hard	Kaito Uesugi	Loic Cloes Marat Deviatiarov	(W/O)
Win	5–4	Jan 2022	M15 Monastir, Tunesia	World Tennis Tour	Hard	Kaito Uesugi	Martin Breysach Arthur Bouquier	6–2 7–6^(7–5)
Loss	5–5	Feb 2022	M25 Canberra, Australia	World Tennis Tour	Hard	Calum Puttergill	Rubin Statham Akira Santillan	4–6 3–6
Loss	5–6	May 2022	M15 Antalya, Turkey	World Tennis Tour	Clay	Yuta Shimizu	Juan Pablo Canas Garcia Pablo Llamas Ruiz	4–6 5–7
Loss	5–7	Sep 2022	M25 Sapporo, Japan	World Tennis Tour	Hard	Rimpei Kawakami	Takuto Niki Takeru Yuzuki	6–3, 4–6, [8–10]
Loss	5–8	Oct 2022	M25 Kashiwa, Japan	World Tennis Tour	Hard	Seita Watanabe	Toshihide Matsui Kaito Uesugi	3–6, 6–4, [5–10]
Loss	5–9	Jan 2023	M15 Jakarta, Indonesia	World Tennis Tour	Hard	Keisuke Saitoh	Rivik Choudary Bollipalli Niki Kaliyanda Poonacha	1–6, 3–6
Loss	5–10	Feb 2023	M15 Monastir, Tunesia	World Tennis Tour	Hard	Ryuki Matsuda	Tim Handel Yannik Steinegger	4–6, 1–6
Loss	5–11	Jun 2023	M25 Anseong, South Korea	World Tennis Tour	Clay	Shunsuke Mitsui	Chung Yun-seong Takeru Yuzuki	6–7^(3–7), 4–6
Win	6–11	Jul 2023	M15 Caloundra, Australia	World Tennis Tour	Hard	Keisuke Saitoh	Jesse Delaney Dayne Kelly	6–3, 6–1
Win	6–12	Oct 2023	M15 Cairns, Australia	World Tennis Tour	Hard	Kokoro Isomura	Kody Pearson Henrik Wiersholm	2–6, 1–6
Win	7–12	Jan 2024	M15 Doha, Qatar	World Tennis Tour	Hard	Masamichi Imamura	Elliot Benchetrit Antoine Ghibaudo	6–2, 6–3
Loss	7–13	Jan 2024	M15 Doha, Qatar	World Tennis Tour	Hard	Masamichi Imamura	Yanki Erel Ergi Kirkin	6–4, 3–6, [2–10]
Loss	7–14	Jun 2024	M15 Anseong, South Korea	World Tennis Tour	Hard	Ethan Cook	Kenta Miyoshi Edward Winter	3–6, 7–5, [6–10]
Loss	7–15	Aug 2024	M25 Aldershot, United Kingdom	World Tennis Tour	Hard	Masamichi Imamura	James Davis Matthew Summers	6–4, 3–6, [10–12]
Loss	7–16	Sep 2024	M25 Takasaki, Japan	World Tennis Tour	Hard	Keisuke Saitoh	Yuta Kawahashi Ryuki Matsuda	6–7^(8–10), 7–6^(7–5), [6–10]
Loss	7–17	Jan 2025	M25 Doha, Qatar	World Tennis Tour	Hard	Yuta Kikuchi	Tibo Colson Thijmen Loof	6–7^(5–7), 4–6
Loss	7–18	Apr 2025	M25 Santa Margherita di Pula, Italy	World Tennis Tour	Clay	Ryuki Matsuda	Raúl Brancaccio Àlex Martínez	3–6, 5–7
Loss	7–19	Apr 2025	M25 Santa Margherita di Pula, Italy	World Tennis Tour	Clay	Ryuki Matsuda	Giovanni Oradini Marcello Serafini	6–4, 6–7^(6–8), [6–10]
Win	8–19	May 2025	Tbilisi, Georgia	Challenger	Hard	Masamichi Imamura	Siddhant Banthia Ramkumar Ramanathan	1–6, 6–3, [10–5]
Loss	8–20	Oct 2025	M25 Perth, Australia	World Tennis Tour	Hard	Masamichi Imamura	Finn Bass Ajeet Rai	1–6, 6–7^(3–7)
Loss	8–21	Mar 2027	M15 Nishitokyo, Japan	World Tennis Tour	Hard	Shinji Hazawa	Ryuki Matsuda Hikaru Shiraishi	2–6, 6–1, [5–10]
Loss	8–22	Sep 2026	Phan Thiết, Vietnam	Challenger	Hard	Yamato Sueoka	Constantin Bittoun Kouzmine S D Prajwal Dev	1–6, 6–7^(0–7)