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 |  |  | | Justin Sun |  | | Residence: | Herndon, VA |
| Birthplace: | Unknown | | Age: | Unknown | | Height: | Unknown | | Plays: | Unknown | | Coaching: | Unknown |  | | Complete Bio | |
Regency Jr. Open #2 L5, January 28, 2011
 Skyline S & H Winter Tourn. Series #3, February 4, 2011
 David Lemair Tennis Jr. Open #4 L5, March 18, 2011
 Avalon Spring Jr. Open L4, April 16, 2011
 Skyline S&H Winter Tourn. Series #4, April 21, 2011
 USTA MAS B16 Challenger #3, May 21, 2011
 Memorial Day Weekend L4, May 27, 2011
 RPM Sports Jr. Open L4, June 14, 2011
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 16 | Loss | Bear Lee | 1711 | 6-3; 3-6; 1-0 |
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USTA MAS BG18-14 Chmp. #3, June 20, 2011
 David Lemair Tennis Jr. Open L4, July 2, 2011
 David Lemair Tennis Jr. Open L5, July 15, 2011
 1st Hollywood Jr. Open L3, July 22, 2011
 Potomac Jr. Open #8 L4, August 26, 2011
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Win | John Richter | | 6-0; 6-3 | | 16 | Loss | Matthew Fine | | 6-0; 6-1 |
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Pentagon City Jr. Open #1 L4, October 14, 2011
 Thanksgiving Classic L4, November 25, 2011
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Win | Daniel Bleykhman | | 6-1; 6-3 | | 16 | Loss | Nicholas Mouser | | 6-0; 6-0 |
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+ Strong win over an ineligible player. * The ranking calculation does not count this match.
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