Seventeen-year-old Jack Karp will play tennis from 9 a.m. to 9 p.m. on Thursday, Sept. 3 to raise money for the Canadian Cancer Society during his fourth annual Do You Have the Balls to Beat Cancer? tennis-a-thon fundraiser. The event takes place at the West Vancouver Tennis Club where Karp invites players to join him for a game in exchange for a donation. In the last three years, Karp has raised $5,500 for cancer research.