Collin Altamirano (born December 7, 1995) is an American professional tennis player.

Altamirano won the 2013 USTA Boys 18 National Championship as an unseeded player, the first ever to do so, defeating Jared Donaldson 6–1, 6–2, 6–4 in the final. This earned him a wild card entry into the 2013 U.S. Open where he lost to 22-seed Philipp Kohlschreiber of Germany in the first round. Prior to the 2013 U.S. Open, Altamirano had only played in six professional-level matches, all at the ITF Men's Circuit level (commonly referred to as Futures), and had lost all six.

Gear Altamirano currently plays with the Wilson Blade racquet and Solinco Tour Bite strings, wearing Babolat Propulse 4 shoes.Collin Altamirano tennistownonline

Tournaments 2013 USTA Boys' 18 Champion - Kalamazoo, MI - USTA Nationals: Collin Altamirano becomes first unseeded player to win singles title 2013 US Open – Boys' singles – Lost in quarterfinals to #1 seeded Alexander Zverev of Germany. Collin was the only American in the Junior Boys' Quarterfinals. 2013 US Open – Men's singles – Lost in first round to Philipp Kohlschreiber 2013 US Open Men's 2018 US Open – Men's singles – Lost in first round to Ugo Humbert

ATP Challenger and ITF Futures finals Singles: 4 (3–1) Legend (singles)ATP Challenger Tour (0–0)ITF Futures Tour (3–1)Titles by surfaceHard (3–1)Clay (0–0)Grass (0–0)Carpet (0–0)

ResultW–LDateTournamentTierSurfaceOpponentScoreLoss0–1USA F2, Long BeachFuturesHard Marcos Giron6–7(3–7), 1–6Win1–1USA F2, Long BeachFuturesHard Emilio Gómez6–1, 7–5Win2–1Singapore F2, SingaporeFuturesHard Takuto Niki7–6(7–5), 6–3Win3–1M15 Austin, USWorld Tennis TourHard Jacob Fearnley4–6, 6–4, 6–4

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