Five-time champion M C Mary Kom began her campaign in style by out punching Sweden's Juliana Soderstrom in her opening bout of the AIBA World Women's Boxing Championships in Astana, Kazakhstan today.Mary Kom in 51 kilograms category defeated Soderstrom 3-0 in a thoroughly lopsided contest to set up a clash on Saturday with Germany's Azize Nimani, who stunned Asian Games bronze-medallist Nandintsetseg Myagmardulam of Mongolia.While Mary Kom was all precision in her punches, especially the right jabs, Soderstrom's swings were mostly off-target. Even though Soderstrom did manage to make an impression in the fourth round, she had already lost the larger battle to her more experienced Indian rival. The prestigious event has 12 Rio tickets on offer.