(From L to R) Spain's Judit Ignacio Sorribes and Mireia Belmonte Garcia, Japan's Natsumi Hoshi and Australia's Jessicah Schipper are seen underwater as they swim in the women's 200m butterfly heats during the London 2012 Olympic Games at the Aquatics Centre July 31, 2012. REUTERS/Michael Dalder (BRITAIN - Tags: SPORT SWIMMING OLYMPICS) 

Australia's Stephanie Rice, Australia's Jessicah Schipper, China's Jiao Liuyang and Japan's Natsumi Hoshi (top-bottom) compete in the women's 200m butterfly heats at the 14th FINA World Championships in Shanghai July 27, 2011. REUTERS/Bobby Yip (CHINA - Tags: SPORT SWIMMING AQUATICS) 

Australia's Jessicah Schipper starts in the women's 200m butterfly heats at the 14th FINA World Championships in Shanghai July 27, 2011. REUTERS/Bobby Yip (CHINA - Tags: SPORT SWIMMING AQUATICS) 

(L-R) Australia's Emily Seebohm, Leisel Jones, Jessicah Schipper and Alicia Coutts celebrate on the podium after winning the gold medal in the women's 4x100m medley relay swimming finals during the Commonwealth Games in New Delhi October 9, 2010. REUTERS/Tim Wimborne (INDIA - Tags: SPORT SWIMMING) 

Australia's Jessicah Schipper (L), Leisel Jones (C) and Emily Seebohm (R) congratulate their team member Alicia Coutts after winning the gold medal in the women's 4x100m medley relay swimming finals during the Commonwealth Games in New Delhi October 9, 2010. REUTERS/Tim Wimborne (INDIA - Tags: SPORT SWIMMING) 

Australia's Jessicah Schipper celebrates on the podium after winning the gold medal in the women's 200m butterfly swimming finals during the Commonwealth Games in New Delhi October 9, 2010. REUTERS/Tim Wimborne (INDIA - Tags: SPORT SWIMMING) 

Australia's Jessicah Schipper competes in the women's 200m butterfly swimming finals during the Commonwealth Games in New Delhi October 9, 2010. Schipper won the gold medal. REUTERS/Tim Wimborne (INDIA - Tags: SPORT SWIMMING) 

Australia's Jessicah Schipper competes in the women's 200m butterfly swimming heats during the Commonwealth Games in New Delhi October 9, 2010. REUTERS/Tim Wimborne (INDIA - Tags: SPORT SWIMMING IMAGES OF THE DAY) 

Australia's Jessicah Schipper competes in the women's 200m butterfly swimming heats during the Commonwealth Games in New Delhi October 9, 2010. REUTERS/Tim Wimborne (INDIA - Tags: SPORT SWIMMING) 

Teresa Crippen of the U.S. swims in the women's 200m butterfly final at the Pan Pacific 2010 swimming championships in Irvine, California August 18, 2010. Crippen finished second in the event to winner Jessicah Schipper of Australia. REUTERS/Lucy Nicholson (UNITED STATES - Tags: SPORT SWIMMING) 

Jessicah Schipper of Australia looks at the replay of her winning the women's 200m butterfly at the Pan Pacific 2010 swimming championships in Irvine, California, August 18, 2010. REUTERS/Christinne Muschi (UNITED STATES - Tags: SPORT SWIMMING) 

Jessicah Schipper of Australia celebrates after winning the women's 200m butterfly at the Pan Pacific 2010 swimming championships in Irvine, California, August 18, 2010. REUTERS/Christinne Muschi (UNITED STATES - Tags: SPORT SWIMMING) 

Gold medallist Jessicah Schipper of Australia poses on the podium after setting a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Alessandro Bianchi (ITALY SPORT SWIMMING) 

Gold medallist Jessicah Schipper of Australia poses on the podium after setting a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Alessandro Bianchi (ITALY SPORT SWIMMING) 

Gold medallist Jessicah Schipper of Australia poses on the podium after setting a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Alessandro Bianchi (ITALY SPORT SWIMMING) 

Gold medallist Jessicah Schipper of Australia celebrates on the podium after setting a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING) 

Gold medallist Jessicah Schipper of Australia celebrates on the podium after setting a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING) 

Jessicah Schipper of Australia reacts after setting a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING) 

Jessicah Schipper of Australia reacts after setting a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING) 

Jessicah Schipper of Australia reacts after setting a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING) 

Jessicah Schipper of Australia reacts after setting a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING) 

Jessicah Schipper of Australia reacts after setting a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Stefano Rellandini (ITALY SPORT SWIMMING) 

Jessicah Schipper of Australia reacts after setting a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Stefano Rellandini (ITALY SPORT SWIMMING) 

Jessicah Schipper of Australia reacts after setting a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Stefano Rellandini (ITALY SPORT SWIMMING) 

Jessicah Schipper of Australia reacts after setting a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Stefano Rellandini (ITALY SPORT SWIMMING) 

Jessicah Schipper of Australia reacts after setting a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Stefano Rellandini (ITALY SPORT SWIMMING IMAGES OF THE DAY) 

Jessicah Schipper of Australia competes to set a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Stefano Rellandini (ITALY SPORT SWIMMING) 

Jessicah Schipper of Australia competes to set a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Stefano Rellandini (ITALY SPORT SWIMMING) 

Jessicah Schipper of Australia (R) and her compatriot Samantha Hamill leave the pool after setting a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Alessandro Bianchi (ITALY SPORT SWIMMING) 

Jessicah Schipper (R) of Australia is congratulated by her compatriot Samantha Hamill after setting a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Alessandro Bianchi (ITALY SPORT SWIMMING) 

Jessicah Schipper (R) of Australia celebrates her world record with teammate Samantha Hamill after women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Max Rossi (ITALY SPORT SWIMMING) 

Jessicah Schipper of Australia is embraced after her world record in women's 200m butterfly swimming final by Mary Descenza (R) of the U.S. at the World Championships in Rome July 30, 2009. REUTERS/Max Rossi (ITALY SPORT SWIMMING) 

Jessicah Schipper (C) of Australia celebrates her world record in the women's 200m butterfly swimming final with team mate Samantha Hamill (L) and Katinka Hosszu of Hungary at the World Championships in Rome July 30, 2009. REUTERS/Tony Gentile (ITALY SPORT SWIMMING IMAGES OF THE DAY) 

Jessicah Schipper of Australia competes to set a world record in the women's 200m butterfly swimming final at the World Championships in Rome July 30, 2009. REUTERS/Tony Gentile (ITALY SPORT SWIMMING) 

Jessicah Schipper of Australia (L) and compatriot Samantha Hamill react after both qualified in the women's 200m butterfly swimming semi-final at the World Championships in Rome July 29, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING) 

Jessicah Schipper of Australia competes in the women's 200m freestyle swimming final at the World Championships in Rome July 29, 2009. REUTERS/Laszlo Balogh (ITALY SPORT SWIMMING) 

Mary Descenza (L) of the U.S. is congratulated by Jessicah Schipper of Australia after setting a world record in the women's 200m butterfly swimming heats at the World Championships in Rome July 29, 2009. REUTERS/Alessandro Bianchi (ITALY SPORT SWIMMING) 

Jessicah Schipper of Australia competes in the women's 200m butterfly swimming heats at the World Championships in Rome July 29, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING) 

Mary Descenza (L) of the U.S. is congratulated by Jessicah Schipper of Australia after setting a world record in the women's 200m butterfly swimming heats at the World Championships in Rome July 29, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING) 

Mireia Belmonte (C) of Spain is flanked by Australians Jessicah Schipper (L) and Samantha Hamill in the women's 200m butterfly swimming heats at the World Championships in Rome July 29, 2009. REUTERS/Stefano Rellandini (ITALY SPORT SWIMMING) 

Mary Descenza (L) of the U.S. is congratulated by Jessicah Schipper of Australia after setting a world record in the women's 200m butterfly swimming heats at the World Championships in Rome July 29, 2009. REUTERS/Max Rossi (ITALY SPORT SWIMMING) 

Mary Descenza (front) of the U.S. is congratulated by Jessicah Schipper of Australia after setting a world record in the women's 200m butterfly swimming heats at the World Championships in Rome July 29, 2009. REUTERS/Max Rossi (ITALY SPORT SWIMMING) 

Gold medallist Sarah Sjostrom of Sweden (C) celebrates on the podium with silver medallist Jessicah Schipper of Australia (L) and bronze medallist Jiao Liuyang of China after the women's 100m butterfly swimming final at the World Championships in Rome July 27, 2009. REUTERS/Alessandro Bianchi (ITALY SPORT SWIMMING) 

Jessicah Schipper of Australia celebrates on the podium after winning the silver medal in the women's 100m butterfly swimming final at the World Championships in Rome July 27, 2009. REUTERS/Alessandro Bianchi (ITALY SPORT SWIMMING) 

Jessicah Schipper of Australia celebrates on the podium after winning the silver medal in the women's 100m butterfly swimming final at the World Championships in Rome July 27, 2009. REUTERS/Alessandro Bianchi (ITALY SPORT SWIMMING) 

Jessicah Schipper of Australia competes in the women's 100m butterfly swimming heats at the World Championships in Rome July 26, 2009. REUTERS/Wolfgang Rattay (ITALY SPORT SWIMMING) 

(L-R) Leisel Jones, Emily Seebohm, Jessicah Schipper and Lisbeth Trickett of Australia pose with their gold medals for the women's 4x100m medley relay swimming final at the National Aquatics Center during the Beijing 2008 Olympic Games August 17, 2008. REUTERS/Wolfgang Rattay (CHINA) 

Lisbeth Trickett and Leisel Jones (R) of Australia celebrate next to their teammates Emily Seebohm (L, hidden) and Jessicah Schipper (2nd R) after winning the women's 4x100m medley relay swimming final at the National Aquatics Center during the Beijing 2008 Olympic Games August 17, 2008. REUTERS/Wolfgang Rattay (CHINA) 

(L-R) Silver medallists Natalie Coughlin, Rebecca Soni, Christine Magnuson and Dara Torres of the U.S. pose with gold medallists Emily Seebohm, Leisel Jones, Lisbeth Trickett and Jessicah Schipper of Australia after the women's 4x100m medley relay swimming final at the National Aquatics Center during the Beijing 2008 Olympic Games August 17, 2008. REUTERS/Kai Pfaffenbach (CHINA) 

(L-R) Lisbeth Trickett, Jessicah Schipper, Leisel Jones and Emily Seebohm of Australia pose with their gold medals for the women's 4x100m medley relay swimming final at the National Aquatics Center during the Beijing 2008 Olympic Games August 17, 2008. REUTERS/Kai Pfaffenbach (CHINA) 

Dara Torres (L) of the U.S. talks to Lisbeth Trickett (C) and Jessicah Schipper of Australia during the medal presentation ceremony for the women's 4x100m medley relay swimming final at the National Aquatics Center during the Beijing 2008 Olympic Games August 17, 2008. REUTERS/David Gray (CHINA) 

(L-R) Emily Seebohm, Leisel Jones, Lisbeth Trickett and Jessicah Schipper of Australia pose with their gold medals for the women's 4x100m medley relay swimming final at the National Aquatics Center during the Beijing 2008 Olympic Games August 17, 2008. REUTERS/David Gray (CHINA) 

(L-R) Lisbeth Trickett, Jessicah Schipper, Leisel Jones and Emily Seebohm of Australia pose with their gold medals for the women's 4x100m medley relay swimming final at the National Aquatics Center during the Beijing 2008 Olympic Games August 17, 2008. REUTERS/Kai Pfaffenbach (CHINA) 

(L-R) Jessicah Schipper, Leisel Jones, Emily Seebohm and Lisbeth Trickett (bottom) of Australia celebrate after winning the women's 4x100m medley relay final at the National Aquatics Center during the Beijing 2008 Olympic Games August 17, 2008. REUTERS/David Gray (CHINA) 

The women's 200m butterfly swimming final gold medal winner Liu Zige (R) of China and bronze medal winner Jessicah Schipper of Australia walk on the pool deck after the medal ceremony at the National Aquatics Center during the Beijing 2008 Olympic Games, August 14, 2008. REUTERS/Kai Pfaffenbach (CHINA) 

Gold medallist Liu Zige (C) of China stands with compatriot and silver medallist Jiao Liuyang (L) and bronze medallist Jessicah Schipper (R) of Australia after the women's 200 meters butterfly final at the National Aquatics Center during the Beijing 2008 Olympic Games August 14, 2008. REUTERS/Jerry Lampen (CHINA) 

Jessicah Schipper of Australia holds up her bronze medal after the women's 200 meters butterfly swimming final at the National Aquatics Center during the Beijing 2008 Olympic Games August 14, 2008. REUTERS/Wolfgang Rattay (CHINA) 

Liu Zige (L) of China is congratulated by Jessicah Schipper of Australia after the women's 200m butterfly swimming final during the Beijing 2008 Olympic Games at the National Aquatics Centre, August 14, 2008. Liu won the gold and set a new world record. REUTERS/David Gray (CHINA) 

Liu Zige (L) of China celebrates after winning the women's 200m butterfly swimming final next to bronze medal winner Jessicah Schipper of Australia during the Beijing 2008 Olympic Games at the National Aquatics Centre, August 14, 2008. The stadium is also known as the Water Cube. REUTERS/David Gray (CHINA) 

Jessicah Schipper of Australia swims in her women's 200 meters butterfly heat at the National Aquatics Center during the Beijing Olympic Games August 12, 2008. REUTERS/David Gray (CHINA)