Schipper made her debut for Australia at the 2003 World Aquatics Championships in Barcelona, winning the bronze medal as part of the 4×100-metre medley relay team. In 2004, she competed in the 2004 Summer Olympics in Athens, placing 4th in the 100-metre butterfly with the time of 58.22 seconds. She also collected the gold medal in the 4×100-metre medley relay, having swum the butterfly leg in the heats of the event. She was awarded the Order of Australia Medal in January 2005 for service to sport.[1]
At the 2006 Commonwealth Games held in Melbourne she won the gold medal in both the 100- and 200-metre butterfly events, as well as the silver medal in 50-metre butterfly. She combined with Sophie Edington, Leisel Jones and Libby Lenton to set a new world record in the 4×100-metre medley relay, collecting her third gold medal of the meet.[citation needed]
Schipper won the gold medal in the 200-metre butterfly at the 2007 World Aquatics Championships in Melbourne, as well as the silver medal in the 100-metre butterfly, behind fellow Australian Libby Lenton.
2008 Summer Olympics
Schipper qualified for the 100- and 200-metre butterfly events in Beijing. Schipper won two bronze medals in her individual events at the 2008 Summer Olympics in Beijing, the 100-metre and 200-metre butterfly. Schipper also won gold in the 4×100-metre medley relay team with teammates Leisel Jones, Libby Trickett and Emily Seebohm.
Following the Olympics, Schipper split with her coach Ken Wood. This came after Wood had sold Schipper's training program to Chinese swimmer Liu Zige, who broke Schipper's world record to take the 200-metre title.[3] She then joined the Commercial Swimming Club in Brisbane, under Stephan Widmar, who previously coached her Australian relay teammates Leisel Jones and Trickett.[citation needed]
Schipper maintained her consistency at the world championship level. On day two, she took silver in the 100-metre butterfly, clocking the second fastest time in history. On day five she retained her 200-metre butterfly title in world record time, defeating Liu Zige by 0.49 of a second. [citation needed]
2012 Summer Olympics
In 2012, Schipper again qualified for the 100- and 200-metre butterfly events. She was eliminated in the heats of the 100 m. She qualified for the semifinal of the 200-metre, but not for the final. Her 200-metre semifinal time of 2:08.21 was nearly 5 seconds slower than her best time in that event. [citation needed]