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 |  |  | | William Duncan |  | | Residence: | Newbury Park, CA |
| Birthplace: | Unknown | | Age: | Unknown | | Height: | Unknown | | Plays: | Unknown | | Coaching: | Unknown |  | | Complete Bio | |
USTA International Spring Chmps., April 6, 2009
 109th Ojai Valley Tourn., April 23, 2009
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 64 | Loss | Christopher Freeman | | 6-3; 6-1 |
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25th Anaheim TC Tourn., May 2, 2009
 Quiksilver Jr. Chmps., May 23, 2009
 94th Santa Barbara Summer Tourn., May 30, 2009
 107th SoCal Sectional Chmps., June 20, 2009
 38th Knowlwood Jr. Tourn., July 23, 2009
 USTA Zone Team BG16 - Salt Lake City, July 29, 2009
 1st Annual Jim Buck Team Jr Tourn., August 28, 2009
 Carmel Valley AC Fall Jr. Chmps., September 4, 2009
 25th Los Caballeros Jr., September 12, 2009
 46th Northridge-Matador Tourn., September 26, 2009
 Dunlop Jr. Chmps., October 10, 2009
 The Orange County Jr. Open, October 24, 2009
 20th Calabasas Jr. Open Tourn., November 6, 2009
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Win | Sam Farzani | | 6-1; 6-0 | | 16 | Loss | Marcelo Sousa | | 7-6; 6-0 |
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The SoCal Jr. Chmps., November 21, 2009
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 64 | Win | Adrian Huffard | 3717 | 6-4; 6-4 | | 16 | Loss | Ben Roger | | 6-4; 7-6 |
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USTA National Open, November 26, 2009
 California Bowl, December 19, 2009
 Copper Bowl Qualifier, December 30, 2009
 Copper Bowl, January 2, 2010
 59th Gene Jung Whittier Midwinter, January 16, 2010
 65th Fullerton Jr. Tourn., January 30, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 128 | Win | Nicholas Papac | | Wo (inj)WoJ* | | 64 | Loss | Reo Asami | 32 | 6-2; 6-2 |
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7th Ramada BG18-8 Open Tourn., February 6, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 64 | Win | Alex Koeberle | | 6-4; 6-2 | | 32 | Win | Joel Suchil | | Wd (inj)WJ* | | 16 | Win | Syogo Shimizu | | Wo (admin)WoJ* |
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29th Woody Hunt Mem. South Bay Tourn., February 27, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 128 | Loss | Sean Levesque | | 6-4; 6-2 |
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* The ranking calculation does not count this match.
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