Dan Cassidy (born April 29, 1961) is a former professional tennis player from the United States. He was born in Hollywood, Florida.
During his career, Cassidy won 1 singles title. He achieved a career-high singles ranking of world No. 68 in 1985 and a career-high doubles ranking of World No. 56 in 1985.
Grand Prix finals Singles (1 win) ResultW-LDateTournamentSurfaceOpponentScoreWin 1–0 Dec 1984 Melbourne Outdoor, Australia Grass John Fitzgerald 7–6, 7–6
Doubles (1 loss) ResultW-LDateTournamentSurfacePartnerOpponentsScoreLoss 0–1 Jul 1986 Boston, U.S. Clay Mel Purcell Hans Gildemeister Andrés Gómez 6–4, 5–7, 0–6
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