Whether the veteran coach, who came to prominence when he helped a 17-year-old Amir Khan win a silver medal at the Athens Olympics, will continue remains unclear, although Mapp and UK Sport are keen for him to do so.

BBC: New body to run GB Olympic boxing

Earlier, Katrin Wagner-Augustin of Germany lost out on her second attempt at becoming the second woman in Olympic history to win a gold medal at four consecutive Games after helping take silver in the women's kayak four (K4).

CNN: Olympics Day 12: Golden day for the U.S.

In 2010, at 16, she became the first Englishwoman to win a medal at the Commonwealth Games, taking home the bronze, and added silver at the World Youth Games the following year before hitting the big stage at London 2012.

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Hamm is the only American man to win the world and Olympic titles, in 2003 and 2004, and he led the team to a silver medal in Athens, its first Olympic team medal in 20 years.

BBC: Injured Hamm forced to withdraw

He was also recently the Chef de Mission of Indonesian delegation in the 2012 Olympics, but later resigned because of the failure of the athletes to bring home a gold medal the first time this has happened in two decades (although Indonesia did win one silver and one bronze).

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