Koharu Niimi
2019
| JB1 SEOGWIPO | 1R | |
| J2 CHUNCHEON | 1R | |
| J2 NAGOYA | 1R | |
| JAOSAKA | 1R | |
| J2 BEIJING-2 | 1R | |
| J3 GUANGZHOU | Quarter | |
| J2 SHANGHAI | 2R | |
| J4 JINAN | [3] | Quarter |
| J5 NOUMEA-2 | [1] | Win |
| J5 NOUMEA | [1] | Win |
| J2 BEIJING | 2R | |
| J4 BEIJING | [4] | Quarter |
| J3 ISTANBUL-2 | [8] | 3R |
| J3 ISTANBUL | [9] | 3R |
| J4 DOHA-2 | [2] | Quarter |
| J4 DOHA | [2] | Quarter |
| J1 NONTHABURI | 2R | |
| J3 SHENZHEN | 2R | |
| J4 SHENZHEN-3 | [5] | 2R |
2018
| J3 PUNE | [4] | Quarter |
| J2 CHUNCHEON | 1R | |
| J2 NAGOYA | [14] | 2R |
| J500OSAKA | 1R | |
| J2 BEIJING | 2R | |
| J3 GUANGZHOU | 1R | |
| J2 SHANGHAI | Semi | |
| J4 JINAN | [5] | 2R |
| J4 CHANGHUACOUNTY | Semi | |
| J2 TAINAN | 1R | |
| J3 CHENGDU | Quarter | |
| J4 CHENGDU | [4] | Semi |
| J2 KOLKATA | 2R |
2017
| J2 NONTHABURI | 2R | |
| J3 AUCKLAND | 2R | |
| J4 CHRISTCHURCH | [11] | Semi |
Nation
JPN
Age
23 years old (born in 2002)
Year-end Junior World Ranking
- Year-end 2020 394th
- Year-end 2019 332th
- Year-end 2018 252th
Match Details
JB1 SEOGWIPO
| L | 1R | Hong Yi Cody Wong | 3-6 1-6 |
J2 CHUNCHEON
| L | 1R | Sihyeong Cho | 4-6 4-6 |
J2 NAGOYA
| L | 1R | Alina Granwehr | 4-6 4-6 |
JAOSAKA
| L | 1R | Romana Cisovska | 6-7 3-6 |
J2 BEIJING-2
| L | 1R | Lan Mi | 3-6 6-7 |
J3 GUANGZHOU
| W | 1R | Zixuan Zeng | 6-1 6-3 |
| W | 2R | Zongyu Li | 7-6 4-6 6-3 |
| L | QF | Hoi Ki Jenny Wong | 2-6 2-6 |
J2 SHANGHAI
| W | 1R | Xichen Zhao | 6-3 6-1 |
| L | 2R | Kuan Yi Lee | 2-6 3-6 |
J4 JINAN
| W | 2R | Haoran Liu | 6-0 6-0 |
| W | 3R | Jiayu Xu | 6-2 6-1 |
| L | QF | Xichen Zhao | 3-6 4-6 |
J5 NOUMEA-2
| W | 2R | Scarlett Perkins | 6-0 6-1 |
| W | 3R | Zorika Morgan | 6-0 6-1 |
| W | QF | Yuna Kadowaki | 6-3 6-3 |
| W | SF | Ayaka Koga | 6-3 6-2 |
| W | F | Pete Komada | 6-4 6-2 |
J5 NOUMEA
| W | 2R | Yoshino Fujita | 6-2 7-5 |
| W | QF | Yuna Kadowaki | 6-2 6-1 |
| W | SF | Ayaka Koga | 6-1 6-3 |
| W | F | Vivian Yang | 6-2 4-6 6-1 |
J2 BEIJING
| W | 1R | Yujiao Che | 6-2 4-6 6-3 |
| L | 2R | Tianmi Mi | 4-6 5-7 |
J4 BEIJING
| W | 1R | Shuman Wu | 7-5 6-2 |
| W | 2R | Meng Yi Chen | 6-3 6-4 |
| W | 3R | Xue Cao | 6-1 6-4 |
| L | QF | Na Dong | 1-6 6-7 |
J3 ISTANBUL-2
| W | 2R | Mariya Polishchuk | 6-3 6-1 |
| L | 3R | Kira Pavlova | 4-6 7-5 1-6 |
J3 ISTANBUL
| W | 2R | Vanessa Ersoz | 6-1 6-3 |
| L | 3R | Selin Lidya Sepken | 2-6 4-6 |
J4 DOHA-2
| W | 1R | Kit Yi Kaye Au-Yeung | 6-2 6-3 |
| W | 2R | Sanne Schalekamp | 6-2 6-1 |
| L | QF | Natalia Szabanin | 7-5 2-6 0-6 |
J4 DOHA
| W | 1R | Sara Pantelic | 6-4 6-3 |
| W | 2R | Stefania Bojica | 6-0 6-3 |
| L | QF | Nina Danisova | 5-7 0-6 |
J1 NONTHABURI
| W | 1R | Yatawee Chimcham | 7-5 6-1 |
| L | 2R | Sijia Wei | 6-3 4-6 2-6 |
J3 SHENZHEN
| W | 1R | Jiaqi Wang | 6-2 7-5 |
| L | 2R | Evelina Kontareva | 4-6 3-6 |
J4 SHENZHEN-3
| W | 1R | Jing Yang | 6-0 6-1 |
| L | 2R | Jiayu Xu | 6-7 1-6 |
J3 PUNE
| W | 1R | Sanjana Sirimalla | 6-3 7-5 |
| W | 2R | Prerna Vichare | 6-2 7-5 |
| L | QF | Salsa Aher | 4-6 4-6 |
J2 CHUNCHEON
| L | 1R | Hwiwon Wi | 1-6 0-6 |
J2 NAGOYA
| L | 2R | Robin Montgomery | 2-6 2-6 |
J500OSAKA
| L | 1R | Alice Amendola | 5-7 4-6 |
J2 BEIJING
| W | 1R | Chao-Yi Wang | 6-4 7-6 |
| L | 2R | Punnin Kovapitukted | 1-6 4-6 |
J3 GUANGZHOU
| L | 1R | Le Yi Liu | 6-4 5-7 4-6 |
J2 SHANGHAI
| W | 1R | Zhuoxuan Bai | 6-1 7-5 |
| W | 2R | Zhenghua Xiao | 3-6 6-3 6-0 |
| W | QF | Megan Smith | 6-4 6-2 |
| L | SF | Sijia Wei | 6-7 2-6 |
J4 JINAN
| L | 2R | Shuoran Wang | 3-6 4-6 |
J4 CHANGHUACOUNTY
| W | 1R | Hyeran Yun | 6-2 6-7 6-3 |
| W | 2R | Ting-Pei Chang | 6-3 6-4 |
| W | QF | Zongyu Li | 7-5 6-3 |
| L | SF | Punnin Kovapitukted | 1-6 1-6 |
J2 TAINAN
| L | 1R | Shivani Amineni | 4-6 1-6 |
J3 CHENGDU
| W | 1R | Yiming Dang | 6-2 4-6 6-2 |
| W | 2R | Anastasia Astakhova | 6-3 1-6 6-2 |
| L | QF | Chae Hyun Sim | 3-6 6-2 6-7 |
J4 CHENGDU
| W | 1R | Zi Xin Xu | 6-1 6-0 |
| W | 2R | Yitong Zhang | 6-1 6-3 |
| W | 3R | Jingyi Wang | 6-1 6-3 |
| W | QF | Yueliang Cao | 6-0 7-5 |
| L | SF | Jiangxue Han | 5-7 2-6 |
J2 KOLKATA
| W | 1R | Sanya Singh | 6-2 7-5 |
| L | 2R | Sophia Biolay | 6-4 2-6 6-7 |
J2 NONTHABURI
| W | 1R | Parisa Rachdanone | 6-3 6-1 |
| L | 2R | Shivani Amineni | 4-6 6-7 |
J3 AUCKLAND
| W | 1R | Samantha Horwood | 6-1 6-1 |
| L | 2R | Oleksandra Kalachova | 5-7 6-0 0-6 |
J4 CHRISTCHURCH
| W | 2R | Joy Andreou | 6-0 6-1 |
| W | 3R | Sophia Fry | 6-3 6-2 |
| W | QF | Uma Nayar | 6-2 6-4 |
| L | SF | Anastasia Berezov | 7-6 4-6 1-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 14431, Number of registered players: 7,550, Number of registered results: 449,006