Dylan Koo, 17, starting off strong in the men's 50m butterfly race at the 47th Singapore National Age Group Swimming Championships. He finished first in the 15-17 age group with a timing of 24.73, beating the last meet record of 25.47 set by Darren Lim in 2013.(Photo 4 © Chua Kai Yun/Red Sports)

Dylan Koo, 16, starting off strong in the men’s 50m butterfly ‘A’ final at the 47th Singapore National Age Group Swimming Championships. He finished first in the 15-17 years old age group with a timing of 24.73s, breaking his own meet record of 25.01s set in the morning heats. He is now the third fastest local swimmer in this event. Only four swimmers have gone below 25 seconds. They are Joseph Schooling (23.25), Quah Zheng Wen (24.02), Dylan (24.73) and Nicholas Tan (24.99). (Photo 4 © Chua Kai Yun/Red Sports)