SINGAPORE - Quah Zheng Wen won the 200m butterfly 'A' final on the third and final day of the Arena Pro Swim Series in Austin, Texas, on Sunday morning.

The 19-year-old Singaporean clocked 1min 58.07sec to top a field featuring Olympian Simon Sjodin of Sweden and reigning 200m backstroke Olympic champion Tyler Clary.

Sjodin was second in 1:58.27, ahead of Ukraine's Andre Seliskar (1:58.47) and Clary (1:58.61).

Quah finished fifth in the 100m back 'B' final, his other race of the day.

The teenager has booked his place at August's Olympics, having qualified for the 100m back, and 100m and 200m fly. He is part of a group of 10 national swimmers in the United States for a training camp.