Fourth seed Shiva Thapa settled for a silver medal at the Asian Boxing Championships after an injury-forced loss in the final in Tashkent today. The 60 kilogram weight category boxer also became the first Indian to claim three back-to-back medals at the continental showpiece.Shiva, up against second seed and local favourite Elnur Abduraimov, lost in a split verdict after a head-butt from his opponent resulted in a cut. It was in the final few seconds of the opening round when Shiva sustained the cut, forcing a stoppage by the referee.The silver is his third successive medal at the continental showpiece after a gold in 2013 and a bronze in the 2015 edition. The Assam-pugilist, a World Championships bronze – medallist in bantamweight (56kg), shifted to lightweight in December last year.