While Vietnam’s economy is expected to become bigger than Singapore’s in the next decade based on both countries’ current rate of growth, there are several challenges that lie ahead for ASEAN’s rising star.In a report published by Singapore-based DBS Bank on Tuesday, senior economist Irvin Seah predicted that Vietnam’s gross domestic product (GDP) will surpass that of Singapore’s by 2029 if Vietnam maintains its annual growth rate of about six to 6.5 percent and Singapore continues to grow at