Ettoré has been playing tennis since youth with his identical twin brother Angelo. He is a USPTA certified teaching professional since 1992 and lifetime member of the USTA. As a player, he has competed in USTA league and tournament play, achieving a rank of #3 in New England in Men's Open Doubles. In USTA league play, he has competed at the 5.0 and open levels and 9.0 mixed doubles, advancing to the Open Nationals in 2006. He reflects: "My game is like wine...it gets better with age." Rossetti is a teaching professional at Milford Indoor Tennis and has taught adult and junior clinics at Yale University since 2000. He has been selected as a guest tennis pro by The Player's Edge Tennis Association and taught with distinguished pros Tom Gullikson and Tim Mayotte. Ettoré began his teaching career at North Haven Health & Racquet under the tutelage of the late Scott Wilson. In memory of Scott Wilson and Tim Gullikson to support the ALS Association and the Tim & Tom Gullikson Foundation, on August 9-10, 2008, he and his brother set the Guinness World Record for the longest tennis rally in duration of time, which lasted 14 hours and 31 minutes while accumulating 25,944 combined strokes. He incorporates modern tennis concepts into his teaching methods as has been inspired by Oscar Wegner and the Inner Game philosophies pioneered by Tim Gallwey. He and his brother secured the #1 doubles ranking in USTA New England Men's Open Division in 2007.