TRENTON — Trenton native Elvi Shelton brought home a pair of titles for the second year in a row Sunday when she won ladies’ open singles and mixed doubles tennis events at the Angell Open in Portland.Shelton, who also coaches the Mount Desert Island girls’ tennis team, won the singles title by beating Rosemary Campanella of Wells 6-3, 6-0 in the women’s final. In mixed doubles, she earned a 6-2, 6-3 final win.Elsewhere, Eliot Potvin of Hampden became a three-time men’s open singles winner by coming back from an early deficit for a 4-6, 7-5, 6-4 win in the final. He also teamed up with Lance Cohen of Orlando, Fla., to win the men’s open doubles crown.In the men’s 45-plus division, Rogier Henny of Portland defeated Brian Mavor of Windham 6-3, 6-2 to earn the championship win. Ron Chicoine of Brunswick defended his title in the 55-plus division with a 4-6, 6-0, 6-3 triumph over Tom Gross of Portland.This is placeholder textThis is placeholder textThe tournament, which started Friday and ended Sunday, is held annually in memory of the late Chris Angell. Angell, a Brooklin native, was the top-ranked player in the state of Maine for a stretch in 2010 and 2011Funds from the tournament helped to raise money for research, advocacy and support for individuals suffering from serious mental illnesses.