Mari Osaka
Mari Osaka is a Japanese tennis player. She is the older sister of Naomi Osaka.
Biography
Osaka was born in Japan to a Japanese mother and a Haitian father. She speaks both English and Japanese and grew up in Fort Lauderdale.Osaka made her WTA Tour debut at the 2014 Bank of the West Classic, in the doubles event partnering with Marina Shamayko, losing in the first round to Varvara Lepchenko and Ajla Tomljanović.
She made her WTA singles debut at the 2019 Miami Open having received a wildcard into the main draw.
ITF finals
Singles: 4 (4 runner–ups)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | Sep 2012 | ITF Amelia Island, United States | 10,000 | Clay |  Jamie Loeb | 3–6, 5–7 |
| Loss | 0–2 | May 2017 | ITF Goyang, South Korea | 25,000 | Hard |  Peangtarn Plipuech | 6–7, 0–6 |
| Loss | 0–3 | Jul 2017 | ITF Denain, France | 25,000 | Clay |  Lina Gjorcheska | 2–6, 7–5, 6–7 |
| Loss | 0–4 | Oct 2018 | ITF Florence, United States | 25,000 | Hard |  Bianca Andreescu | 4–6, 6–2, 3–6 |