A series of errors sent Japan's Rika Kihira sliding from second to seventh overall after the women's free skate at the ISU World Figure Skating Championships on Friday.Sixteen-year-old Anna Shcherbakova, who led Kihira after the short program, secured the win on her worlds debut after scoring 152.17 points in the free skate to tally 233.17 points overall. She led an all-Russian top-three, the first time its skaters have swept the podium in the women's event.Elizaveta Tuktamysheva scored 220.46 points and Alexandra Trusova 217.20 points to finish second and third.Kaori Sakamoto was the highe…READ FULL ARTICLE