Stadium: Court 3 Round: 44 Ground: Hardcourt outdoor
| ITF W25 Hamburg | 2021/10/20 08:00 | Alice Robbe v Greiner, Lena | 6-0,6-1 |
| ITF W25 Braunschweig | 2021/08/23 08:30 | Oana Gavrila v Greiner, Lena | 4-6,6-4,10-3 |
| ITF - W15 Héraklion | 2021/05/26 10:45 | Greiner, Lena v Malesevic, Tamara | 0-6,6-2,3-6 |
| ITF - W15 Héraklion | 2021/05/17 07:00 | Simona Ogescu v Greiner, Lena | 6-0,6-4 |
| ITF - W15 Héraklion | 2021/05/16 09:00 | Greiner, Lena v Georgiadou, Maria | 7-5,6-1 |
| German Championship Women | 2020/12/07 08:00 | Greiner, Lena v Steffi Bachofer | 1-6,1-6 |
| Stuttgart-Stammheim, Singles W-ITF-GER-01A | 2020/01/19 09:00 | Greiner, Lena v Courcoux, Pauline | 0-6,4-6 |
| ITF W25 Braunschweig | 2019/08/19 10:55 | Marine Partaud v Greiner, Lena | 6-3,6-2 |
| ITF W25 Lima | 2021/10/13 17:30 | Hayashida, Daianne v Amandine Hesse | 1-6,1-6 |
| ITF W25 Lima | 2021/10/05 18:20 | Carlota Martinez Cirez v Hayashida, Daianne | 6-4,6-1 |
| Fed Cup, Matchs en Doubles | 2020/02/07 13:00 | Victoria Bosio v Hayashida, Daianne | 7-5,6-1 |
| ITF W15 Lima | 2019/07/11 14:30 | James, Akilah v Hayashida, Daianne | 6-1,6-1 |
| ITF W15 Lima | 2019/07/09 16:30 | Hayashida, Daianne v Kuprina, Anastasiia | 2-6,6-1,6-4 |
| ITF Women Buenos Aires | 2018/09/19 16:35 | Jazmin Ortenzi v Hayashida, Daianne | 6-1,6-2 |
| ITF Women Buenos Aires | 2018/09/18 15:30 | Pedemonti, Azul Agustina v Hayashida, Daianne | 3-6,0-6 |
| ITF Women Buenos Aires | 2018/09/16 14:15 | Friant, Eimi v Hayashida, Daianne | 4-6,1-6 |