She has won one singles title and 27 doubles titles on the
ITF Women's Circuit. On 3 April 2017, she reached a career-high singles ranking of world No. 520. On 24 July 2023, she peaked at No. 102 in the
WTA doubles rankings. Fomina made her
WTA Tour debut at the
2014 Topshelf Open, partnering
Christina Shakovets in
doubles, but lost her first-round match against
Maria Kirilenko and
Yanina Wickmayer. Partnering
Cristina Bucșa, she won the doubles title at the
WTA 125 2023 Grand Est Open 88, defeating
Amina Anshba and
Anastasia Dețiuc in the final. ==WTA Challenger finals==