Margot Andreasen, about to enter her senior year at Portland High School, won the women’s open singles championship Sunday at the Pete Debevoise Memorial tennis tournament in South Portland. Andreasen, who won the title on her mother’s birthday no less, defeated Marcy Weeks in the final, 6-2, 6-0. Max Wilkey took the men’s open singles title. Mike Burkey and Lexi Epstein won the open mixed doubles division.