Moscow - Marieke Guehrer and Evelyn Verraszto were the stars on a record-breaking opening day of the Moscow leg of FINA's World Cup series on Friday.
Australia's Guehrer, the overall winner of the series in 2008, claimed two gold medals as she set a new world record of 26.17 seconds in the women's 50-metre backstroke in the short course competition.
The 23-year-old from Melbourne broke the previous mark of 26.23, set by Croatia's Sanja Jovanovic at Rijeka, Croatia on December 13, 2008.
She also won the 50m freestyle ahead of Hinkelien Schreuder of the Netherlands and Swede Therese Alshammar.
Hungary's Verraszto proved to be the revelation on the first of the two-day competition as she set a new record in the 200-metre individual medley.
The 20-year-old clocked 2:06.01 to better the 2:06.13 achieved by Zimbabwe's Kirsty Coventry in Manchester, England on April 12, 2008.
Her time was the best in the World Cup competition as well since 2003.
Hosts Russia had a successful opening day winning four of the nine men's titles with South Africa's men taking three gold.
Russia's Sergey Fesikov took two gold - the 100m freestyle and the 100m individual medley - and compatriot Nikita Lobintsev the 400m freestyle.
Cameron van der Burgh led a South African sweep of the men's 50m breaststroke ahead of Roland Schoeman and Neil Versfeld.
Schoeman went on to win the 50m butterfly ahead of Russian Evgeny Korotyshkin and compatriot Lyndon Ferns, as Versfeld won the 200m breaststroke.
Australian women took three of the eight golds on offer with Felicity Galvez winning the 100m butterfly to add to Guehrer's two gold.
The two-day competition continues on Saturday.
Results from the first day of the second stage of FINA swimming World Cup series on Friday:
1. Cameron Van Der Burgh (RSA) 25.58, 2. Roland Schoeman (RSA) 25.80, 3. Neil Versfeld (RSA) 26.52
1. Roland Schoeman (RSA) 22.33, 2. Evgeny Korotyshkin (RUS) 22.50, 3. Lyndon Ferns (RSA) 22.93
1. Sergey Fesikov (RUS) 45.87, 2. Brent Hayden (CAN) 46.14, 3. Stefan Nystrand (SWE) 46.16
1. Peter Marshall (USA) 49.49, 2. Stanialv Donets (RUS) 50.12, 3. Arkady Vyatchanin (RUS) 50.39
100m individual medley
1. Sergey Fesikov (RUS) 51.45, 2. Darian Townsend (RSA) 52.09, 3. Markus Rogan (AUT) 53.60
1. Neil Versfeld (RSA) 2:04.15, 2. Igor Borysik (UKR) 2:04.86, 3. Grigory Falko (RUS) 2:05.49
1. Nikolay Skvortsov (RUS) 1:51.30, 2. Chad Le Clos (RSA) 1:55.32, 3. Thomas Vilaceca (FRA) 1:55.52
1. Nikita Lobintsev (RUS) 3:38.40, 2. Mads Glaesner (DEN) 3:40.10, 3. Mikhail Polishchuk (RUS) 3:40.65
400m individual medley
1. David Verraszto (HUN) 4:03.45, 2. Chad Le Clos (RSA) 4:06.41, 3. Andrey Krylov (RUS) 4:10.08
1. Marieke Guehrer (AUS) 23.92, 2. Hinkelien Schreuder (NED) 23.95, 3. Therese Alshammar (SWE) 24.11
1. Marieka Guehrer (AUS) 26.17, 2. Fabiola Molina (BRA) 26.61, 3. Hinkelien Schreuder (NED) 26.72
1. Felicity Galvez (AUS) 55.82, 2. Therese Alshammar (SWE) 56.23, 3. Jeanette Ottesen (DEN) 57.09
1. Jessica Hardy (USA) 1:03.75, 2. Rikke Moeller Pedersen (DEN) 1:04.43, 3. Leisel Jones (AUS) 1:04.61
1. Sarah Sjostrom (SWE) 1:54.02, 2. Agnes Mutina (HUN) 1:56.30, 3. Daria Belyakona (RUS) 1:56.63
1. Daryna Zevina (UKR) 2:04.59, 2. Evelyn Virraszto (HUN) 2:05.91, 3. Kseniya Moskvina (RUS) 2:07.88
200m individual medley
1. Evelyn Virraszto (HUN) 2:06.01 (world record), 2. Whitney Myers (USA) 2:08.79, 3. Joanna Maranhao-Melo (BRA) 2:09.03
1. Lotte Friis (DEN) 8:12.94, 2. Jaana Ehmcke (GER) 8:21.02, 3. Isabelle Harle (GER) 8:30.65