Olympic Champion 2004
|2004 Athens||Europe class|
|2003 Cádiz||Europe class|
|2004 Cagliari||Europe class|
|2002 Hamilton||Europe class|
|2003 Palma de Mallorca||Europe class|
Sundby was selected female sailor of the year by the International Sailing Federation in 2003.
Sundby revealed in July 2006 that she was giving up sailing. Since her sailing partner Karianne Melleby became pregnant and gave up sailing, Sundby had been looking for a new partner, but then decided that there was not enough time to prepare with a new partner before the 2008 Summer Olympics, and still have a realistic chance of winning gold.
Her parents live in Son, south of Oslo. She lives in Oslo with her husband, Christopher Gundersen, who is a sailor. She has a Bachelor of Science in Engineering from Technical University of Denmark, 2008, and is attending her final year of the Master program, Innovation and Entrepreneurship, 2011, at BI Norwegian Business School in Oslo.