2017–2021 In 2017, she won the
Petits As U14 championship in
Tarbes, France. In July 2021, she won the $60k
President's Cup in Nur-Sultan, Kazakhstan, alongside
Alina Charaeva.
2023–2024: WTA Tour, major & top 100 debuts, First WTA title Timofeeva won her first
WTA Tour title on her main-draw debut at the
Budapest Grand Prix in July 2023, defeating
Kateryna Baindl in three sets in the final. She became only the fourth lucky loser in WTA history to win a singles title and the ninth player to win a title on her tour debut; she was the second to do both at once, following
Olga Danilović at the
2018 Moscow River Cup. As a result, she reached the top 125 in the rankings, on 11 September 2023. Ranked No. 170, she qualified for the
2024 Australian Open making her Grand Slam tournament debut. She defeated
Alizé Cornet, former
Australian Open champion
Caroline Wozniacki and 10th seed
Beatriz Haddad Maia to advance to the fourth round where she lost to
Marta Kostyuk. She reached the top 100 on 29 January 2024, moving up 70 positions, becoming the first 2003-born player to enter the Top 100. Timofeeva qualified for the
2024 Miami Open and defeated
Varvara Gracheva, before losing in the second round to 26th seed
Linda Nosková. At the
2024 French Open, she lost in the first round to
Wang Yafan in straight sets. Attempting to defend her
Budapest Grand Prix title, Timofeeva won her opening match against qualifier
Simona Waltert but then lost to
Aliaksandra Sasnovich in round two. ==National representation ==