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 |  |  | | Derek Klein |  | | Residence: | San Diego, CA |
| Birthplace: | Unknown | | Age: | Unknown | | Height: | Unknown | | Plays: | Unknown | | Coaching: | Unknown |  | | Complete Bio | |
Esme Pearson Memorial Tourn., January 5, 2008
 63rd Fullerton Jr Tourn., February 2, 2008
 USTA National Opens, February 16, 2008
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 64 | Loss | Matthew Alves | | 6-3; 6-2 | | 1 | Win | Kyle Del Rosario | | 6-2; 6-3 | | 2 | Loss | Stefan Menichella | 69 | 5-7; 6-1; 6-2 |
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27th Woody Hunt Mem. South Bay Tourn., March 1, 2008
 74th Harper Ink Mem. Tourn., March 29, 2008
 38th Maureen Connolly Easter Tourn., April 19, 2008
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 64 | Win | Tosten Burks | | 6-1; 6-4 | | 32 | Loss | Aaron Marvin | | 6-3; 4-6; 6-4 |
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24th Anaheim TC Tourn., May 3, 2008
 USTA B14 National Opens, May 17, 2008
 Quiksilver B18-12 Chmps., May 24, 2008
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 128 | Loss | Adam Bagdy | 548 | 6-4; 6-4 | | 2 | Loss | Andrew You | | 6-4; 6-4 |
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106th SoCal Sectional Chmps., June 14, 2008
 USTA National Opens, June 28, 2008
 USTA Zone Team Chmps BG14 - Dothan, July 6, 2008
 13th Balboa TC Jr. Tourn., July 28, 2008
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Win | Ben Berkowitz | | 6-2; 7-6 | | 16 | Win | Jack Schreiber | | 6-4; 6-0 | | Q | Win | Luke Meoli | 677 | 6-0; 6-2 | | S | Win | Jack McCullers | + | 7-5; 4-6; 7-5 | | F | Win | Rodrigo Obregon | | 6-4; 4-6; 6-1 |
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Carmel Valley AC Fall Jr. Chmps., August 29, 2008
 24th Los Caballeros Jr., September 6, 2008
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 256 | Win | Roy Nielsen | | 6-1; 6-1 | | 128 | Win | Ryo Shimizu | | 4-6; 6-1; 6-2 | | 64 | Loss | Billy Pecor | | 6-1; 6-0 |
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45th Northridge-Matador Tourn., September 20, 2008
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 128 | Win | Sam Buckland | | 6-1; 6-1 | | 64 | Loss | Alexander Gryaznov | | 7-6; 6-1 |
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Wilson Jr. Chmps., October 4, 2008
 The Orange Co. Jr. Open, October 18, 2008
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 256 | Win | Royce Kim | | 6-2; 6-0 | | 128 | Loss | Ryan Peyton | | 6-4; 6-4 |
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Thanksgiving Vacation Jr. Tourn., November 8, 2008
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Win | Sean Kent | | 6-2; 6-2 | | 16 | Win | Cameron Amyot | + | 6-1; 6-3 | | Q | Loss | Cameron Bernhardt | | 6-1; 6-0 |
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USTA National Opens, November 27, 2008
 45th Anaheim Jr. Tourn., December 6, 2008
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 64 | Win | Jaime Soliz | | 6-2; 6-0 | | 32 | Win | Christian Ball | 532 | 6-1; 6-2 | | 16 | Win | Anthony Su | 516 | 6-3; 6-7; 6-2 | | Q | Win | Brandon Schlack | | 7-5; 6-3 | | S | Win | Christopher Chan | | 6-1; 0-6; 6-4 | | F | Loss | Michael Lowe | | 6-1; 6-4 |
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+ Strong win over an ineligible player. * The ranking calculation does not count this match.
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