Rina Saigo

is a Japanese tennis player. She has a career-high singles ranking of world No. 330 by the WTA, achieved on 9 September 2024. She also has a career-high doubles ranking of No. 317, set on 26 February 2024.

Career Saigo made her WTA Tour debut after making it through qualifying at the 2022 Pan Pacific Open, but lost in the main-draw first round to Petra Martić.

She also qualified for the 2023 Pan Pacific Open, again losing in the first round, this time to Cristina Bucșa.

ITF Circuit finals Singles: 8 (5 titles, 3 runner–ups) LegendW35 tournaments (3–2)W15 tournaments (2–1)Finals by surfaceHard (4–2)Clay (1–0)Carpet (0–1)

Doubles: 17 (6 titles, 11 runner–ups) LegendW60 tournaments (0–1)W40 tournaments (0–1)W25 tournaments (1–1)W15 tournaments (5–8)Finals by surfaceHard (4–5)Clay (2–5)Carpet (0–1)