Samel Sahil Chetan (in orange) of Singapore Sports School gives one last burst in the 400m final. He eventually settled for silver in 51.58s. (Photo 3 © Iman Hashim/Red Sports)

Samel Sahil Chetan (in orange) of Singapore Sports School gives one last burst in the 400m final. He eventually settled for silver in 51.58s. (Photo 3 © Iman Hashim/Red Sports)