Men's gymnastics, tennis and indoor track programs were eliminated last year. In the lawsuit filed Friday, Ng alleges the university discriminated against male athletes by cutting only their teams. He and his lawyers argued the university mistakenly believed the federal law requires the proportion of male athletes to match the proportion of men in the student body. The result of this mistaken notion is that the university has essentially implemented quotas based on sex for its athletics," Caleb Trotter, an attorney for the Pacific Legal Foundation representing Ng, said during a Friday news conference on the Twin Cities campus.