BERLIN - Hammer world-record holder Betty Heidler has said she will not appear at the 2015 world championships in Beijing, three months after failing to qualify for the worlds final in Moscow. The 30-year-old, who threw the world record of 79.42 metres in May 2011, failed to qualify for the hammer final at world athletics championships. She has called time on any future appearances at world championships. "I still have no firm date for when I will retire, I think about things from year to year, but I won't be competing at a world championships again," Heidler said." Having won gold at the 2007 world athletics championships in Osaka, Japan, Heidler won world silvers at both Berlin in 2009 and Daegu in 2011, as well as a bronze at the 2012 London Olympics.–AFP