Quah Jing Wen, 16, swimming her backstroke leg during the 400m IM event. She finished first in 15-17 age group with a timing of 4:59.59, rewriting her own meet record of 5:03.45 set last year. (Photo © Chua Kai Yun/Red Sports)

Quah Jing Wen, 15, swimming the backstroke leg of her 400m IM race. She finished first in the 15-17 years old age group with a timing of 4:59.59, rewriting her own meet record of 5:03.45 set last year. (Photo 9 © Chua Kai Yun/Red Sports)