Valentini Grammatikopoulou

Valentini Grammatikopoulou (; born 9 February 1997) is a Greek tennis player. On 22 August 2022, she reached her best singles ranking of world No. 143. On 15 July 2024, she peaked at No. 97 in the WTA doubles rankings. She has won a singles and a doubles title on the WTA Challenger Tour, and in addition, 15 singles and 35 doubles titles on the ITF Women's Circuit.

Playing for Greece, Grammatikopoulou has a win–loss record of 26–17 in Billie Jean King Cup competition (as of July 2025).

Career Playing with Ulrikke Eikeri, Grammatikopoulou reached her first WTA Tour doubles final at the 2021 Lausanne Open, losing to Susan Bandecchi and Simona Waltert in a deciding champions tiebreak.

She made her major debut at the 2021 US Open as a qualifier, after attempting to qualify 12 times for a major. It marked the first time ever that three Greek players were in the US Open main draw. On her major debut, she reached the second round after defeating Anna Blinkova, 6-3, 6-2. It was her third career win at the WTA Tour-level. Grammatikopoulou lost her next match to 15th seed Elise Mertens.

Grammatikopoulou qualified for her second Grand Slam tournament at the 2022 French Open, losing in the first round to wildcard entrant Daria Saville.

In August 2022, Grammatikopoulou won her biggest singles title to date at the WTA 125 Vancouver Open, defeating Lucia Bronzetti in the final.

Partnering Despina Papamichail, she won her first WTA 125 doubles title at the 2023 Barranquilla Open, overcoming Yuliana Lizarazo and María Paulina Pérez in the final.

Performance timelines

Only main-draw results in WTA Tour, Grand Slam tournaments, Fed Cup/Billie Jean King Cup and Olympic Games are included in win–loss records.

Singles

WTA Tour finals

Doubles: 1 (runner-up) LegendWTA 500WTA 250 (0–1)Finals by surfaceClay (0–1)Finals by settingOutdoor (0–1)

WTA 125 finals

Singles: 1 (title)

Doubles: 4 (1 title, 3 runner-ups)

ITF Circuit finals

Singles: 32 (16 titles, 16 runner-ups) LegendW40 tournaments (1–0) W25/35 tournaments (6–8)W10/15 tournaments (9–8)

Doubles: 63 (35 titles, 28 runner-ups) LegendW100 tournaments (1–1) W80 tournaments (0–1)W60/75 tournaments (5–3)W40 tournaments (0–1)W25/35 tournaments (21–15)W10/15 tournaments (8–7)