Welson:
SHAH ALAM: Welson Sim admits he is wary of the Vietnamese threat ahead of his 200m and 400m freestyle titles defence at the Philippines SEA Games in November.
Welson is eager to see how he stacks up against Hoang Quy Phuoc (200m) and Nguyen Huy Hoang (400m) as the duo have yet to compete in any of the international swimming competitions to date.
