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 |  |  | | Kathleen DeCosse |  | | Residence: | Fairfax, VA |
| Birthplace: | Unknown | | Age: | Unknown | | Height: | Unknown | | Plays: | Unknown | | Coaching: | Unknown |  | | Complete Bio | |
USTA MAS G14 Chmp. #1 L1, January 29, 2011
 USTA MAS G14 Challenger #1 L2, February 18, 2011
 Potomac Jr. Open #5 L5, March 11, 2011
 Fredericksburg USTA Jr. L4, March 19, 2011
 Skyline S&H Winter Tourn. Series #4, April 21, 2011
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Win | Ilina Mitra | | 6-3; 6-3 | | 16 | Win | Julia Potter | 646 | 6-2; 6-3 | | Q | Win | Kaylah Hodge | | 7-6(4); 6-2 | | S | Loss | Cierra Plummer | | 6-3; 6-4 |
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USTA MAS G14 Challenger #2, April 30, 2011
 USTA MAS G14 Challenger #3, May 21, 2011
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Win | Alissa Rosen | 1007 | 6-0; 6-0 | | 16 | Loss | Aishwarya Iyer | | 6-4; 6-1 |
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CCF Clay Court Chmps. L5, June 17, 2011
 USTA MAS BG18-14 Chmp. #3, June 20, 2011
 The Columbia Jr. Open L3, July 11, 2011
 1st Hollywood Jr. Open L3, July 22, 2011
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 16 | Win | Kathryn Bock | | 6-1; 3-0Ret (ill)RI | | Q | Win | Shannon Hanley | 482 | 6-4; 6-0 | | S | Win | Kamilla Beisenova | | 6-2; 6-1 | | F | Win | Mariam Salakaia | 384 | 6-4; 6-0 |
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USTA BG14 Zonals - Cary, July 27, 2011
 USTA MAS G16 Challenger #5, August 20, 2011
 USTA MAS G16 Challenger #6, September 17, 2011
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Win | Mariam Salakaia | 384 | 7-5Ret (ill)RI | | 16 | Loss | Sydney Rider | | 6-1; 6-2 |
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USTA MAS G14 Championship #4, October 8, 2011
 USTA MAS G16 Challenger #7, November 5, 2011
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 16 | Loss | Katie Gauch | 704 | 6-4; 3-6; 7-5 |
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USTA National Open, November 25, 2011
 USTA MAS BG16 Challenger #8, December 10, 2011
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Win | Rena Liu | | 6-2; 6-3 | | 16 | Win | Rachel Halinski | 1072 | 6-3; 7-5 | | Q | Loss | Kynadi Mauney | | 6-3; 6-3 |
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* The ranking calculation does not count this match.
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