Clubmate Glenn Snyders managed third place in the men's 50m breaststroke in 27.00 although he was suffering from a virus, and scratched from his other events.
The World Cup moves to the final European meet in Berlin this weekend before the final three rounds in Beijing, Tokyo and Singapore next month.
Results, FINA World Cup, Moscow:
Women 200m backstroke: Melissa Ingram (NZL) 2:05.35, 1; Kylie Stewart (USA) 2:05.79, 2; Katinka Hosszu (HUN) 2:07.29, 3.
Men 50m backstroke: Fabio Scozzoli (ITA) 26.51, 1; Sergei Geibel (RUS) 26.74, 2; Glenn Snyders (NZL) 27.00, 3.
Women 400m freestyle: Elena Sokolova (RUS) 4:04.83, 1; Leah Smith (USA) 4:05.04, 2; Melissa Ingram (NZL) 4:06.20, 3.