Ekaterina Lopes (née Ivanova; born 18 December 1987) is a Russian former tennis player.

Her highest WTA rankings are 136 in singles, which she reached in June 2009, and 142 in doubles, set in January 2012.

Her strongest showing in a tour event was reaching the quarterfinal of the Barcelona Ladies Open in 2008 as a qualifier.

On 18 October 2011, at the Kremlin Cup, Lopes defeated world No.

13, Jelena Janković, 6–4, 1–6, 6–4.