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 |  |  | | Collin Altamirano |  | | Residence: | Yuba City, CA |
| Birthplace: | Unknown | | Age: | Unknown | | Height: | Unknown | | Plays: | Unknown | | Coaching: | Unknown |  | | Complete Bio | |
Johnson Ranch BG18-10 Chmps., February 12, 2011
 Alameda Jr. Open, February 26, 2011
 Modesto Jr. Chmps., March 12, 2011
 Diamond Hills Jr. Championship, March 26, 2011
 USTA BG16-14 National Spring Chmps., April 10, 2011
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 128 | Loss | Noah Rubin | 1 | 6-1; 6-4 | | 1 | Win | Myles Tang | + | 6-3; 7-6(2) | | 2 | Win | Mac Rechan | 235 | 6-2Ret (inj)RJ | | 3Q | Loss | Conrad Harron | | 6-2; 6-2 |
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Rio Del Oro Chmp. Tourn., April 23, 2011
 USTA National Open, May 14, 2011
 Spare Time Memorial Day Jr. Excellence, May 21, 2011
 NorCal BG18-16 Sectional Chmps., June 13, 2011
 USTA Regional Tourn. (Sacramento), July 9, 2011
 USTA B18-16 National Clay Court Chmps., July 17, 2011
 USTA National BG18-16 Chmps., August 5, 2011
 USTA Regional Tourn. (Carmel), September 3, 2011
 Courtside Jr. Chmp., September 17, 2011
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 64 | Win | Manpreet Tiwana | | 6-2; 6-2 | | 32 | Win | Lovedeep Singh | + | 6-2; 1-6; 6-2 | | 16 | Win | Trevor James | | 6-4; 6-1 | | Q | Loss | David Hsu | | 6-2; 6-1 |
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Fremont TC Jr. Chmps., October 1, 2011
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Win | Stuart Miller | | 6-2; 6-0 | | 16 | Loss | David Hsu | | 6-4; 6-0 |
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Legler-Roberts Tennis Chmps., October 29, 2011
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Win | Allen Edwin | | 6-1; 6-2 | | 16 | Win | David Konstantinov | | Def (refsl)DP* | | Q | Win | Justin Chan | + | 6-4; 6-1 | | S | Win | Max Vogt | | 6-1; 6-2 | | F | Win | Benjamin Vierra | 154 | 6-1; 6-3 |
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USTA BG18-16 National Winter Chmps., December 27, 2011
 + Strong win over an ineligible player. * The ranking calculation does not count this match.
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