India's quest for the Asia Cup got off to a perfect start with the title contenders steamrolling Bangladesh by six wickets in a lop-sided cricket match at Dambulla in Sri Lanka. Virender Sehwag emerged as India's bowling hero with his first four-wicket haul, while his Delhi teammate Gautam Gambhir (82) struck his 20th ODI half-century as India cruised to a facile win at a strikingly empty Rangiri Dambulla International Stadium. Having scuttled out Bangladesh for a meager 167 inside 35 overs, India had a modest total to chase and they overwhelmed the target with 19.2 overs to spare to collect a bonus point from this resounding victory. The Indians will have to beat either Pakistan (June 19) or defending champions Sri Lanka (June 22) by a convincing margin to qualify for the June 24 final.