South African 800m runner Caster Semenya said on Wednesday her controversial victory in the 2009 outdoor world championships was behind her and she was solely focussed on adding Olympic gold. The 21-year-old – who is coached by 2000 Sydney Olympics 800m champion Mutola from Mozambique – had to undergo drug tests followed by gender tests following that magnificent victory in Berlin. The situation spiralled out of control with Caster complaining of “unwarranted and invasive scrutiny of the most intimate and private details of my being”. She was barred from the track for almost a year before being cleared to run again and her comeback was hampered by a lower back injury and a growing belief that coach Michael Seme had taken her as far as he could. However, she told several British national newspapers on Wednesday that nightmare was all in the past and she wanted to go on and win the gold – something if she does achieve she will dedicate to the increasingly frail South African political icon Nelson Mandela, who celebrates his 94th birthday on Wednesday. “That is in the past,” she said. “You need to concentrate on the future. I don’t have to entertain those things now. I can concentrate on my running, that’s all. “With each year I experience I become a more relaxed athlete. I also know what is important to listen to and what to ignore.