Romashina won four consecutive Olympic gold medals in the team competition at the 2008, 2012, 2016 and 2020 Summer Olympics. She also won the duet event at London and Rio de Janeiro with Natalia Ishchenko. At the 2020 Summer Olympics held in Tokyo in 2021, Romashina partnered Svetlana Kolesnichenko in the duet event, which they proceeded to win.