Five-time world champion M C Mary Kom's hopes of a second successive Olympic appearance ended today after she went down in the second round of the AIBA Women's World Boxing Championships in Astana, Kazakhstan. Mary Kom (51 Kg category), who was a bronze-medallist at the 2012, London Olympics, lost 0-2 to Germany's Azize Nimani in the second round of an event from where only the semifinalists would make the cut for the upcoming Rio Games.Nimani will next be up against top seed Davide Marzia of Italy who got the better of Hungary's Katalin Ancsin.