Collin Altamirano
Collin Altamirano 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, and had lost all six.
Gear
Altamirano currently plays with the Wilson Blade racquet and Solinco Tour Bite strings, wearing Babolat Propulse 4 shoes.Tournaments
- - 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
- 2018 US Open – Men's singles – Lost in first round to Ugo Humbert
ATP Challenger and ITF Futures finals
Singles: 4 (3–1)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | USA F2, Long Beach | Futures | Hard |  dts|Jan 2018 |