South African 800m runner Caster Semenya is scheduled to make her Olympic debut tomorrow, confident that her controversial victory in the 2009 world championships is a thing of the past.
The 21-year-old -- who is coached by 2000 Sydney Olympics 800m champion Maria 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 Semenya 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 said on the eve of the Games: "That is in the past.
"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.
"I try to run my best always but sometimes I do not and I have to deal with negatives. People ask questions that can make you sad, but I must always stay positive.
"That's what I have to learn. I have to act professionally. But this is my first Olympics so it'll be special for me."
Semenya will face a tough test from Kenyan nemesis Pamela Jelimo, the defending Olympic champion who has bettered in five races the South African's season's best time of 1min 59.18sec.
