Navka/Kostomarov teamed up in 1998 for the first time, but split after one season. While Kostomarov skated with Anna Semenovitch in the 1999/2000 season, Navka married her long time boyfriend (and now coach) Zhulin in 2000. Their daughter Sasha was born in May, 2000. Shortly afterwards Kostomarov called her and suggested they skate together again. Both have been on the international scene with different partners for many years. Navka skated with Gezalian (who later won the German Nationals with Goolsbee) and with Nikolai Morozov, representing Belarus. Kostomarov was the 1996 World Junior Champion with Ekaterina Davydova. Kostomarov married multiple Austrian Champion Julia Lautova in June 2004.