Kateryna Bondarenko incident raises security concerns

playA fan is escorted out after jumping onto the court to attempt to snap a photo with Kateryna Bondarenko after her second-round win at the US Open. (0:27)NEW YORK -- Kateryna Bondarenko, who had just won her second-round singles match, was collecting her things at the changeover chair Wednesday night when a man named Sam Hu jumped off the three-foot ledge that separates Court 13 from the stands.

Hu landed awkwardly, but turned deftly toward the seats and slipped his left arm around her back. Bondarenko, almost reflexively, responded in kind with her right arm, awaiting the imminent photo opportunity.

As a friend in the stands snapped the shot, Hu, hip to hip with Bondarenko, gleefully gave…