| Qatar Open 2019, MS | 12/08 09:00 | 4 | 티에, 야나 v Ishigaki, Yuka | L | 4-3 | |
| Qatar Open 2019, MS | 11/19 11:10 | 4 | Ishigaki, Yuka v 전, 지희 | L | 1-4 | |
| Swedish Open (WTP) 2019, WS | 11/18 16:50 | 5 | Ishigaki, Yuka v 바트라, 마니카 | W | 4-0 | |
| Qatar Open 2019, MS | 11/18 10:30 | 6 | Ishigaki, Yuka v 마다라즈, 도라 | W | 4-0 | |
| Qatar Open XD | 11/12 11:10 | 4 | Ishigaki, Yuka v 이토, 미마 | L | 1-4 | |
| Qatar Open XD | 11/11 18:40 | 5 | Ishigaki, Yuka v 수, 와이 얌 미니 | W | 4-0 | |
| Qatar Open XD | 11/11 13:30 | 6 | Ishigaki, Yuka v Hanna Haponova | W | 4-0 | |
| Qatar Open XD | 09/16 11:30 | 4 | 첸, 멍 v Ishigaki, Yuka | L | 4-0 | |
| Qatar Open XD | 09/16 06:40 | 5 | 청, 셴-쯔 v Ishigaki, Yuka | W | 1-4 | |
| Qatar Open 2019, MS | 09/11 08:29 | - | 파블로비치, 빅토리아 v Ishigaki, Yuka | L | 4-3 | |
| Qatar Open 2019, MS | 09/10 14:59 | - | 노스코바, 야나 v Ishigaki, Yuka | W | 1-4 | |
| Qatar Open 2019, MS | 09/10 08:54 | - | 블라즈코, 안나 v Ishigaki, Yuka | W | 0-4 | |
| Qatar Open 2019, MS | 09/03 10:20 | 4 | Ishigaki, Yuka v 질버라이젠, 크리스틴 | L | 2-4 | |
| Qatar Open 2019, MS | 09/02 16:35 | 5 | Ishigaki, Yuka v 디아코누, 아디나 | W | 4-1 | |
| Qatar Open 2019, MS | 09/02 09:35 | 6 | Ishigaki, Yuka v 발린트, 베르나데트 | W | 4-0 | |
| Swedish Open (WTP) 2019, WS | 11/15 13:00 | 4 | Ishigaki, Yuka v 우, 양 | L | 0-4 | |
| Swedish Open (WTP) 2019, WS | 11/14 17:00 | 5 | Ishigaki, Yuka v 전, 지희 | W | 4-1 | |
| Swedish Open (WTP) 2019, WS | 11/14 10:45 | 6 | Ishigaki, Yuka v 구, 위팅 | W | 4-3 |
Yuka Ishigaki (石垣 優香, Ishigaki Yuka, born 22 July 1989) is a Japanese table tennis player who plays a defensive, chopping style.
Ishigaki has won singles titles at the 2010 Egypt Open and the 2016 Bulgaria Open, and a women's doubles crown at the 2010 Japan Open.