Nicola Spirig Hug of Switzerland rides during the Women's Triathlon on Day 15 of the Rio 2016 Olympic Games at Fort Copacabana on August 20, 2016 in Rio de Janeiro, Brazil.

Andrea Hewitt (38) of New Zealand, Nicola Spirig Hug (18) of Switzerland and Vicky Holland (14) of Great Britain lead a group during the Women's Triathlon on Day 15 of the Rio 2016 Olympic Games at Fort Copacabana on August 20, 2016 in Rio de Janeiro, Brazil.

Nicola Spirig Hug (18) of Switzerland and Gwen Jorgensen (20) of the United States of America run during the Women's Triathlon on Day 15 of the Rio 2016 Olympic Games at Fort Copacabana on August 20, 2016 in Rio de Janeiro, Brazil.

London 2012 - triathlon gold medallist Nicola Spirig of Switzerland (left), third placed Erin Densham of Australia, and silver winner Lisa Norden of Sweden.

London 2012 - triathlon silver medallist Lisa Norden of Sweden celebrates, despite losing out to Nicola Spirig by a fraction of a second. She completed the race in 1:59:48.

London 2012 - Swiss triathlon gold medallist Nicola Spirig (left) and silver runner-up Lisa Norden of Sweden embrace after the race.

London 2012 - a thrilling photo finish in the women's triathlon. Nicola Spirig of Switzerland was judged to have crossed the finish line first, with Lisa Norden of Sweden a fraction of a second behind her.