 After three weeks off, Duclos played one of his best tournaments on tour, qualifying to reach the second round of the 2010 Nielsen Pro Tennis Championship in singles while winning the doubles.Beating Juan-Manuel Elizondo and Luka Gregorc, both in straight sets, in qualifying, he defeated Dominican Republic No.1 Víctor Estrella in the round of 32 before losing narrowly in the round of 16 to Björn Phau, 3–6 in the third set.