Former Asian silver-medallist Sonia Lather (57kg) is the lone Indian boxer to make the semifinals at the AIBA Women's World Championships in Kazakhstan. Four others lost their quarterfinal bouts at Astana today. By entering the last four stage, Sonia has assured herself of a medal in the non-Olympic category. Sonia got the better of Poland's Aneta Rygielska 3-0. She will now face Italian Alessia Mesiano, who scored a 2:0 triumph over Russian Viktoriia Kuleshova in her quarterfinal bout.Sonia's perfromance has saved India of a complete washout at an event where not one from the country could qualify for Rio in the three Olympic categories of 51kg, 60kg and 75kg. The ones to bow out of contention in the non-Olympic categories were previous edition's silver-medallist Sarjubala Devi (48kg), former junior champion Nikhat Zareen (54kg), Saweety (81kg) and Seema Poonia (+81kg).