[1] Having trained in the same group in Odessa,[1] Grushina and Ruslan Goncharov were paired together in 1989 with coaches Aleksander Tumanovskiy and Maria Tumanovskaya [2] They finished fourth at the 1992 Junior Worlds.

In early 1997, Grushina and Goncharov began training with coaches Natalia Linichuk and Gennadi Karponosov in Newark, Delaware.

In the summer of 2002, they changed coaches to Tatiana Tarasova and Nikolai Morozov in Newington, Connecticut.

During the 2003–04 season, Grushina and Goncharov won three silver medals on the Grand Prix series, at 2003 Skate America, 2003 Cup of China, and 2003 NHK Trophy.

During the 2004–05 season, Grushina and Goncharov competed at one Grand Prix event, 2004 Cup of Russia, where they won the silver medal.

Grushina took part in Russian Dancing On Ice show where she met Mikhail Zelensky, a TV presenter.