In World Men's Boxing Championship, National Champion Duryodhan Singh Negi claimed an exhausting 4-1 triumph over Armenia's Koryun Astoyan in his opening bout in the 69 Kilogram category in Ekaterinburg, Russia today.

The Indian will face Jordan's sixth seed Zeyad Eashash in the round of 32 on Monday. Eashash got a bye in the opening round.

Commonwealth Games silver-medalist Manish Kaushik (63kg) and Brijesh Yadav (81kg) had earlier won their opening bouts to enter the second round.

On the other hand, Asian Champion Amit Panghal (52kg) and the Asian silver-winning duo of Kavinder Singh Bisht (57kg) and Ashish Kumar (75kg) got first-round byes.