(Portland, OR) -- A new report from the "Willamette Week" says a woman filed a sexual assault complaint against billionaire Mark Cuban nearly seven years ago. The paper says the woman told police in April of 2011 that the Dallas Mavericks owner groped her under her clothes when they posed for a picture in a Portland bar. The woman said she asked to take a picture with Cuban. He was in Portland for a game between the Mavericks and the Trail Blazers. Cuban denied the accusation when a detective interviewed him as part of an investigation. The district attorney determined there wasn't enough evidence to file charges.