Netherlands' Ranomi Kromowidjojo and compatriot Marleen Veldhuis (back facing camera) celebrate after winning gold and bronze respectively in the women's 50m freestyle final during the London 2012 Olympic Games at the Aquatics Centre August 4, 2012. REUTERS/Tim Wimborne (BRITAIN - Tags: SPORT SWIMMING OLYMPICS TPX IMAGES OF THE DAY)

Netherlands' Ranomi Kromowidjojo and compatriot Marleen Veldhuis (back facing camera) celebrate after winning gold and bronze respectively in the women's 50m freestyle final during the London 2012 Olympic Games at the Aquatics Centre August 4, 2012. REUTERS/Tim Wimborne (BRITAIN - Tags: SPORT SWIMMING OLYMPICS)

Netherlands' Ranomi Kromowidjojo and compatriot Marleen Veldhuis (back facing camera) celebrate after winning gold and bronze respectively in the women's 50m freestyle final during the London 2012 Olympic Games at the Aquatics Centre August 4, 2012. REUTERS/Tim Wimborne (BRITAIN - Tags: SPORT SWIMMING OLYMPICS)

Netherlands' Ranomi Kromowidjojo (L) and compatriot Marleen Veldhuis celebrate after winning gold and bronze respectively in the women's 50m freestyle final during the London 2012 Olympic Games at the Aquatics Centre August 4, 2012. REUTERS/Jorge Silva (BRITAIN - Tags: SPORT SWIMMING OLYMPICS)

Netherlands' Ranomi Kromowidjojo and her compatriot Marleen Veldhuis (L) pose with their gold and bronze medals respectively during the women's 50m freestyle victory ceremony at the London 2012 Olympic Games at the Aquatics Centre August 4, 2012. REUTERS/Toby Melville (BRITAIN - Tags: OLYMPICS SPORT SWIMMING)

Netherlands' Ranomi Kromowidjojo and her compatriot Marleen Veldhuis (L) pose with their gold and bronze medals respectively during the women's 50m freestyle victory ceremony at the London 2012 Olympic Games at the Aquatics Centre August 4, 2012. REUTERS/Michael Dalder (BRITAIN - Tags: SPORT SWIMMING OLYMPICS)

Belarus' Aliaksandra Herasimenia, Netherlands' Ranomi Kromowidjojo and her compatriot Marleen Veldhuis (L-R) pose with their silver, gold and bronze medals respectively during the women's 50m freestyle victory ceremony at the London 2012 Olympic Games at the Aquatics Centre August 4, 2012. REUTERS/Jorge Silva (BRITAIN - Tags: SPORT SWIMMING OLYMPICS)

Belarus' Aliaksandra Herasimenia, Netherlands' Ranomi Kromowidjojo and her compatriot Marleen Veldhuis (L-R) pose with their silver, gold and bronze medals respectively during the women's 50m freestyle victory ceremony at the London 2012 Olympic Games at the Aquatics Centre August 4, 2012. REUTERS/Jorge Silva (BRITAIN - Tags: SPORT SWIMMING OLYMPICS)

Belarus' Aliaksandra Herasimenia, Netherlands' Ranomi Kromowidjojo and her compatriot Marleen Veldhuis (L-R) pose with their silver, gold and bronze medals respectively during the women's 50m freestyle victory ceremony at the London 2012 Olympic Games at the Aquatics Centre August 4, 2012. REUTERS/Jorge Silva (BRITAIN - Tags: SPORT SWIMMING OLYMPICS TPX IMAGES OF THE DAY)

Netherlands' Ranomi Kromowidjojo (L) and compatriot Marleen Veldhuis celebrate after winning gold and bronze respectively in the women's 50m freestyle final during the London 2012 Olympic Games at the Aquatics Centre August 4, 2012. REUTERS/Toby Melville (BRITAIN - Tags: SPORT SWIMMING OLYMPICS)

Netherlands' Ranomi Kromowidjojo and compatriot Marleen Veldhuis celebrate after winning gold and bronze respectively in the women's 50m freestyle final during the London 2012 Olympic Games at the Aquatics Centre August 4, 2012. REUTERS/Toby Melville (BRITAIN - Tags: SPORT SWIMMING OLYMPICS)

Netherlands' Ranomi Kromowidjojo (L) and compatriot Marleen Veldhuis celebrate after winning gold and bronze respectively in the women's 50m freestyle final during the London 2012 Olympic Games at the Aquatics Centre August 4, 2012. REUTERS/Michael Dalder (BRITAIN - Tags: SPORT SWIMMING OLYMPICS)

Netherlands' Ranomi Kromowidjojo (L) and compatriot Marleen Veldhuis celebrate after winning gold and bronze respectively in the women's 50m freestyle final during the London 2012 Olympic Games at the Aquatics Centre August 4, 2012. REUTERS/Toby Melville (BRITAIN - Tags: SPORT SWIMMING OLYMPICS TPX IMAGES OF THE DAY)

Netherlands' Ranomi Kromowidjojo (L) and compatriot Marleen Veldhuis celebrate after winning gold and bronze respectively in the women's 50m freestyle final during the London 2012 Olympic Games at the Aquatics Centre August 4, 2012. REUTERS/Michael Dalder (BRITAIN - Tags: SPORT SWIMMING OLYMPICS)

Netherlands' Ranomi Kromowidjojo (L) and compatriot Marleen Veldhuis celebrate after winning gold and bronze respectively in the women's 50m freestyle final during the London 2012 Olympic Games at the Aquatics Centre August 4, 2012. REUTERS/Michael Dalder (BRITAIN - Tags: SPORT SWIMMING OLYMPICS)

Netherlands' Marleen Veldhuis wins the women's 50m freestyle semi-finals during the London 2012 Olympic Games at the Aquatics Centre August 3, 2012. REUTERS/Tim Wimborne (BRITAIN - Tags: SPORT SWIMMING SPORT OLYMPICS)

Netherlands' Marleen Veldhuis and Germany's Britta Steffen swim in the women's 50m freestyle semi-finals during the London 2012 Olympic Games at the Aquatics Centre August 3, 2012. REUTERS/Michael Dalder (BRITAIN - Tags: SPORT SWIMMING SPORT OLYMPICS)

Marleen Veldhuis of Netherlands, Ranomi Kromowidjojo of Netherlands and Jessica Hardy of the U.S. swims in the women's 50m freestyle heats during the London 2012 Olympic Games at the Aquatics Centre August 3, 2012. REUTERS/Michael Dalder (BRITAIN - Tags: SPORT OLYMPICS SPORT SWIMMING)

Members of the Netherlands' women's relay team hold their silver medals for the women's 4x100m freestyle relay final during the London 2012 Olympic Games at the Aquatics Centre July 28, 2012. Seen are (L-R) Ranomi Kromowidjojo, Marleen Veldhuis, Femke Heemskerk and Inge Dekker. REUTERS/Toby Melville (BRITAIN - Tags: SPORT OLYMPICS SPORT SWIMMING)

Members of the Netherlands' women's relay team hold their silver medals for the women's 4x100m freestyle relay final during the London 2012 Olympic Games at the Aquatics Centre July 28, 2012. Seen are (L-R) Inge Dekker, Marleen Veldhuis, Femke Heemskerk and Ranomi Kromowidjojo. REUTERS/David Gray (BRITAIN - Tags: SPORT OLYMPICS SPORT SWIMMING)

Marleen Veldhuis of the Netherlands reacts after winning the Women's 50m Freestyle Guest Final at the British Gas Swimming Championships 2012 at the Olympic Aquatics Centre in London March 9, 2012. REUTERS/Toby Melville (BRITAIN - Tags: SPORT SWIMMING OLYMPICS)

Europe's Marleen Veldhuis of the Netherlands celebrates winning the Women's 50 meter Freestyle during the Mutual of Omaha Duel in the Pool swimming competition at the Georgia Tech Aquatic Center in Atlanta, Georgia December 17, 2011. REUTERS/Tami Chappell (UNITED STATES - Tags: SPORT SWIMMING)

Silver medallist Ranomi Kromowidjojo of the Netherlands, gold medallist Therese Alshammar of Sweden (C) and bronze medallist Marleen Veldhuis of the Netherlands show their medals during a ceremony after the women's 50m freestyle final at the 14th FINA World Championships in Shanghai July 31, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING AQUATICS)

Marleen Veldhuis of the Netherlands competes in the women's 50m freestyle heats at the 14th FINA World Championships in Shanghai July 30, 2011. REUTERS/Christinne Muschi (CHINA - Tags: SPORT SWIMMING AQUATICS)

Inge Dekker, Ranomi Kromowidjojo, Marleen Veldhuis and Femke Heemskerk (L-R) of the Netherlands pose with their gold medals after winning the women's 4 X 100m freestyle relay final at the 14th FINA World Championships in Shanghai July 24, 2011. REUTERS/Issei Kato (CHINA - Tags: SPORT SWIMMING IMAGE OF THE DAY AQUATICS)

Ranomi Kromowidjojo, Inge Dekker, Femke Heemskerk and Marleen Veldhuis (L-R) of the Netherlands celebrate after winning the women's 4 X 100m freestyle relay final at the 14th FINA World Championships in Shanghai July 24, 2011. REUTERS/Christinne Muschi (CHINA - Tags: SPORT SWIMMING AQUATICS)

Femke Heemskerk (wearing cap) of the Netherlands hugs her teammate Marleen Veldhuis as their other teammates Inge Dekker (R) and Ranomi Kromowidjojo stand by after winning the women's 4 X 100m freestyle relay final at the 14th FINA World Championships in Shanghai July 24, 2011. REUTERS/Carlos Barria (CHINA - Tags: SPORT SWIMMING AQUATICS)

Femke Heemskerk, Marleen Veldhuis, Inge Dekker and Ranomi Kromowidjojo (L-R) of the Netherlands celebrate after winning the women's 4 X 100m freestyle relay final at the 14th FINA World Championships in Shanghai July 24, 2011. REUTERS/Issei Kato (CHINA - Tags: SPORT SWIMMING AQUATICS)

Marleen Veldhuis, Ranomi Kromowidjojo and Inge Dekker (L-R) of the Netherlands react after winning the women's 4x100m freestyle relay final at the 14th FINA World Championships in Shanghai July 24, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING)

Marleen Veldhuis (top L), Ranomi Kromowidjojo (R) and Inge Dekker of the Netherlands celebrate with their teammate Femke Heemskerk (bottom) after winning the women's 4 X 100m freestyle relay final at the 14th FINA World Championships in Shanghai July 24, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING AQUATICS)

Marleen Veldhuis, Femke Heemskerk, Ranomi Kromowidjojo and Inge Dekker (L-R) of the Netherlands acknowledge the crowd after winning the women's 4 X 100m freestyle relay final at the 14th FINA World Championships in Shanghai July 24, 2011. REUTERS/David Gray (CHINA - Tags: SPORT SWIMMING AQUATICS)

Marleen Veldhuis (L) of Netherlands and Cate Campbell of Australia pose on the podium with their bronze medals after the women's 50m freestyle swimming final at the World Championships in Rome August 2, 2009. REUTERS/Alessandro Bianchi (ITALY SPORT SWIMMING)

Britta Steffen (2nd L) of Germany poses with her gold medal alongside silver medallist Therese Alshammar (L) of Sweden, and Marleen Veldhuis (2nd R) of the Netherlands and Cate Campbell of Australia who both tied for bronze in the women's 50m freestyle swimming final at the World Championships in Rome August 2, 2009. REUTERS/Alessandro Bianchi (ITALY)

Britta Steffen (2nd L) of Germany poses with her gold medal alongside silver medallist Therese Alshammar (L) of Sweden, and Marleen Veldhuis (2nd R) of the Netherland and Cate Campbell of Australia who both tied for bronze in the women's 50m freestyle swimming final at the World Championships in Rome August 2, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherlands reacts after competing in the women's 50m freestyle swimming final at the World Championships in Rome August 2, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherlands reacts after competing in the women's 50m freestyle swimming final at the World Championships in Rome August 2, 2009. REUTERS/Stefano Rellandini (ITALY SPORT SWIMMING)

Ingvild Snildal (L) of Norway, Therese Alshammar of Sweden and Marleen Veldhuis of the Netherlands compete in the women's 50m butterfly swimming final at the World Championships in Rome August 1, 2009. Picture taken with a fisheye lens. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING)

Marieke Guehrer of Australia (R) is congratulated by Therese Alshammar of Sweden as Marleen Veldhuis of the Netherlands (L) look on after winning the women's 50m butterfly swimming final at the World Championships in Rome August 1, 2009. REUTERS/Alessandro Bianchi (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherlands competes in the men's 1500m freestyle swimming heats at the World Championships in Rome August 1, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherlands competes in the women's 50m freestyle swimming heats at the World Championships in Rome August 01, 2009. REUTERS/Wolfgang Rattay (ITALY)

Marleen Veldhuis of the Netherlands competes in the women's 50m freestyle swimming heats at the World Championships in Rome August 01, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherlands starts in the women's 50m freestyle swimming heats at the World Championships in Rome August 1, 2009. REUTERS/Alessandro Bianchi (ITALY SPORT SWIMMING)

Marleen Veldhuis of Netherlands (L) competes in the women's 50m butterfly swimming semi-final at the World Championships in Rome July 31, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherlands waves after competing in the women's 50m butterfly swimming semi-final at the World Championships in Rome July 31, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherlands competes in the women's 50m butterfly swimming semi-final at the World Championships in Rome July 31, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING)

Marleen Veldhuis of Netherlands looks at the scoreboard after the women's 50m butterfly swimming semi-finals at the World Championships in Rome July 31, 2009. REUTERS/Tony Gentile (ITALY SPORT SWIMMING)

Marleen Veldhuis of Netherlands celebrates after the women's 50m butterfly swimming semi-finals at the World Championships in Rome July 31, 2009. REUTERS/Tony Gentile (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherland reacts after competing in the women's 50m butterfly swimming semi-final at the World Championships in Rome July 31, 2009. REUTERS/Max Rossi (ITALY SPORT SWIMMING)

Marleen Veldhuis of Netherlands prepares to compete in the women's 50m butterfly swimming semi-final at the World Championships in Rome July 31, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherland reacts after competing in the women's 50m butterfly swimming semi-final at the World Championships in Rome July 31, 2009. REUTERS/Max Rossi (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherlands competes in the women's 50m butterfly swimming heats at the World Championships in Rome July 31, 2009. REUTERS/Alessandro Bianchi (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherlands competes in the women's 50m butterfly swimming heats at the World Championships in Rome July 31, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherlands smiles as she rests in the pool after competing in the women's 50m butterfly swimming heats at the World Championships in Rome July 31, 2009. REUTERS/Max Rossi (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherlands competes in the women's 50m butterfly swimming heats at the World Championships in Rome July 31, 2009. REUTERS/Max Rossi (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherlands rests in the pool after competing in the women's 50m butterfly swimming heats at the World Championships in Rome July 31, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherlands rests in the pool after competing in the women's 50m butterfly swimming heats at the World Championships in Rome July 31, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherlands smiles as she rests in the pool after competing in the women's 50m butterfly swimming heats at the World Championships in Rome July 31, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherlands competes in the women's 50m butterfly swimming heats at the World Championships in Rome July 31, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherlands competes in the women's 50m butterfly swimming heats at the World Championships in Rome July 31, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING)

Marleen Veldhuis of the Netherlands prepares to compete in the women's 100m freestyle swimming heats at the World Championships in Rome July 30, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING)