Five-time world champion M C Mary Kom and Asian Games bronze-medallist L Sarita Devi lost their respective second round bouts of the AIBA Women's World Boxing Championships in Astana, Kazakhstan on Saturday. With their defeats, both Mary Kom and Sarita Devi have failed to qualify for the Rio Olympics. In this event, only the semifinalists in the three Olympic categories would make the cut for the upcoming Rio Games.Mary Kom who was a bronze-medallist at the 2012 London Olympics, lost 0-2 to Germany's Azize Nimani in the 51 kilogram category. Sarita Devi was beaten 0-3 by Victoria Torres in the 60 kilogram category.The only Olympic hope now left for India in the event is Pooja Rani in the 75 kilogram category. She is currently in the prequarterfinals after winning her opening bout yesterday.