Caster Semenya dominated the 800-meter race at the World Challenge meet in Berlin Sunday, and her opponents have reignited controversy over the teenager’s gender. “Most of us just feel that we are literally running against a man,” said sore loser Diane Cummins, who finished eighth. Semenya won the same race a year ago, then was forced to go though gender-verification tests. This was just her third race since she was cleared to continue competing as a woman. With only 100 meters to go, Semenya was 20 meters behind American Christin Wurth-Thomas when she easily breezed past her opponent and won by several strides. Several runners said they felt frustrated because Semenya’s naturally high testosterone levels give her an advantage. "Even if she is a female, she's on the very fringe of the normal athlete female biological composition from what I understand of hormone testing,” said Cummins.