Stadium: Court B1 Round: 25 Ground: Hardcourt outdoor
| Granby, Simples W-ITF-CAN-05A | 2019/07/25 14:00 | Tanaka, Yuuki v Lizette Cabrera | 4-6,3-6 |
| Gatineau, Singles W-ITF-CAN-04A | 2019/07/18 14:00 | Gleason, Quinn v Tanaka, Yuuki | 6-0,7-6 |
| Gatineau, Singles W-ITF-CAN-04A | 2019/07/17 14:00 | Verner, Holly v Tanaka, Yuuki | 0-6,1-6 |
| ITF W25 Saskatoon | 2019/07/09 15:00 | Tanaka, Yuuki v Montez, Pamela | 4-6,3-6 |
| Daegu, Singles W-ITF-KOR-04A | 2019/06/04 01:00 | Tanaka, Yuuki v Kim, Na Ri | 3-6,6-7 |
| Daegu, Singles W-ITF-KOR-04A | 2019/06/03 01:00 | Tanaka, Yuuki v Park, Ji Min | 6-4,6-2 |
| ITF W25 Goyang | 2019/05/23 02:00 | Tanaka, Yuuki v Simmonds, Chanel | 2-6,2-6 |
| ITF W25 Goyang | 2019/05/22 05:20 | Minokoshi, Mai v Tanaka, Yuuki | 5-7,7-6,5-7 |
| Taipei, Singles W-ITF-TPE-01A | 2019/07/31 02:00 | Erina Hayashi v Haruka Kaji | 4-6,2-6 |
| ITF W25 Aschaffenburg | 2019/07/18 11:00 | Erina Hayashi v Ekaterina Makarova | 1-6,2-6 |
| ITF W25 Aschaffenburg | 2019/07/17 14:25 | Lemoine, Quirine v Erina Hayashi | 2-6,4-6 |
| Biella, Singles Qualifying W-ITF-ITA-15A | 2019/07/02 10:30 | Erina Hayashi v Laura Pigossi | 6-7,3-6 |
| Biella, Singles Qualifying W-ITF-ITA-15A | 2019/07/01 08:00 | Erina Hayashi v Marie Mettraux | 6-4,6-4 |
| ITF W25 Tarvisio | 2019/06/25 09:25 | Erina Hayashi v Rasheeda McAdoo | 3-6,6-2,11-13 |
| Hong Kong, Simples W-ITF-HKG-01B | 2019/06/01 08:00 | Ho Ching Wu v Erina Hayashi | 5-7,1-6 |
| Hong Kong, Simples W-ITF-HKG-01B | 2019/06/01 02:00 | Erina Hayashi v Momoko Kobori | 7-5,6-2 |