| Daegu, Singles W-ITF-KOR-04A | 06/07 02:30 | 25 | [438] Sawayanagi, Riko v 리앙, 언 수어 [290] | 6-7,0-6 | |
| Gifu, Singles W-ITF-JPN-09A | 05/01 02:45 | 54 | 코바야시, 호노카 v Sawayanagi, Riko | Retired | |
| ITF W15 Fukui | 04/27 00:55 | 26 | Rinon Okuwaki v Sawayanagi, Riko | 3-6,6-2,6-3 | |
| ITF W15 Fukui | 04/25 02:00 | 25 | 타카야마, 치히로 v Sawayanagi, Riko | 5-7,0-6 | |
| Osaka, Singles W-ITF-JPN-02A | 04/12 09:30 | 25 | [298] 여우, 시아우디 v Sawayanagi, Riko [425] | 6-1,6-1 | |
| Osaka, Singles W-ITF-JPN-02A | 04/10 04:50 | 62 | Gyeong Seo Lee v Sawayanagi, Riko | 4-6,2-6 | |
| Osaka, Singles W-ITF-JPN-02A | 04/10 01:00 | 62 | 야마구치, 아이 v Sawayanagi, Riko | 2-6,4-6 | |
| Osaka, Singles W-ITF-JPN-02A | 04/09 01:00 | 62 | Ozeki, Ayaka v Sawayanagi, Riko | 0-6,0-6 | |
| ITF W60 Canberra | 03/21 03:00 | 25 | [461] Sawayanagi, Riko v 자쿠포비치, 다릴라 [218] | 2-6,2-6 | |
| ITF W60 Canberra | 03/20 00:25 | 54 | [366] 양, 야-이 v Sawayanagi, Riko [486] | 6-3,0-6,1-6 | |
| ITF W60 Canberra Qual | 03/18 23:00 | 54 | 프리, 소피아 v Sawayanagi, Riko | 0-6,0-6 | |
| ITF W60 Canberra | 03/15 23:00 | 26 | [322] 카지, 하루카 v Sawayanagi, Riko [486] | 6-2,4-6,6-2 |