Ekaterina Alexeyevna Davydova skated with Roman Kostomarov, who was a 2006 Olympic champion, two-time World champion, three-time Grand Prix Final champion, and three-time European champion.
Ekaterina Alexeyevna Davydova (Russian:    , born 17 September 1978) is a Russian former competitive ice dancer. 
 She is the 1996 World Junior champion with Roman Kostomarov. 
 With partner Tatiana Navka, he is the 2006 Olympic champion, two-time World champion (200405), three-time Grand Prix Final champion (200305), and three-time European champion (200406). 
