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 |  |  | | Sean Ko |  | | Residence: | Danville, CA |
| Birthplace: | Unknown | | Age: | Unknown | | Height: | Unknown | | Plays: | Unknown | | Coaching: | Unknown |  | | Complete Bio | |
Happy New Year Lafayette TC Open, January 1, 2010
 19th Jr. Solano Open, January 16, 2010
 Lafayette Tennis Club Open & Nov., January 30, 2010
 Johnson Ranch BG18-10 Chmps., February 27, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 64 | Loss | Sean Alves | 95 | 7-5; 6-3 |
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S.O.S. Spring Jr. Open & Novice, March 6, 2010
 West Lane BG14-10 Chmps., March 13, 2010
 Diamond Hills Jr. Chmps., March 27, 2010
 Spare Time Jr. Chmps., April 10, 2010
 Rio Del Oro Chmp. Tourn., April 24, 2010
 Fremont TC BG18-10 Open, May 8, 2010
 Spare Time Mem. Day Jr. Excellence, May 22, 2010
 Deer Valley Open, June 4, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | Q | Win | Zackary Ea | 1941 | 6-1; 6-0 | | S | Win | Parker Silverman | | 6-4; 6-3 | | F | Loss | Jonathan Kim | | 6-2; 7-6(8) |
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28th Annual Solano Jr. Open, June 11, 2010
 NorCal BG14 Sectional Chmps., June 14, 2010
 48th Capt. Weber Days Jr. Open, June 26, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 16 | Win | Jaimeson Cortez | | 7-5; 6-3 | | Q | Win | Jake Keester | | 6-1; 6-1 | | S | Loss | Glenn Hull | | 6-1; 6-0 | | PL | Win | Brandon James | | 6-1; 6-0 |
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Lafayette TC Proud to be an American, July 2, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Win | Henry Stephens | | 6-3; 6-0 | | 16 | Loss | Manpreet Tiwana | | 6-1; 5-7; 10-3 |
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A-Z Tennis' East Bay Jr. Open, July 6, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | Q | Loss | Jonathan Kim | | 6-0; 6-4 |
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Tiburon Summer Jr. Open, July 9, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Win | Brian Tan | + | 7-5; 6-1 | | 16 | Loss | Moritz Burgmaier | | 6-3; 6-0 |
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Ryan Meyer/ Darra Silverman Chal., July 12, 2010
 LTC Heat Wave Open, July 17, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Win | Christopher Chang | | 6-2; 6-1 | | 16 | Win | Matthew Wong | | 6-0; 6-0 | | Q | Win | Cole Miller | | 6-0; 6-1 | | S | Loss | Brian Tan | | 6-3; 0-6; 10-6 | | PL | Win | Jonathan Kim | | Wo (inj)WoJ* |
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Fremont TC Jr. Open, July 19, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 64 | Win | Pulak Goyal | | 6-0; 6-0 | | 32 | Loss | Manpreet Tiwana | | 6-2; 6-7(6); 6-3 |
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Hunter Gallaway's Refuse To Lose, July 24, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 16 | Win | Luke Bohuslav | + | 6-4; 6-1 | | Q | Win | William Boyd | | 7-5; 6-4 | | S | Loss | Brian Tan | | 6-4; 6-2 | | PL | Win | Arjun Sarkar | | 6-1; 6-0 |
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West Coast Chmps., August 2, 2010
 Green Valley Jr. Open Tourn., August 28, 2010
 Carmel Valley AC Fall Jr. Chmps., September 3, 2010
 Santa Cruz TA Jr. Open, September 11, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 16 | Win | Richie Sarwal | | 6-1; 6-0 | | Q | Win | Bryce McKelvie | + | 3-6; 6-3; 1-0(7) | | S | Win | Steven Zheng | 699 | 6-0; 6-1 | | F | Loss | Manpreet Tiwana | | 7-5; 7-5 |
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Courtside Jr. Chmp., September 18, 2010
 Fremont TC Jr. Chmps., October 2, 2010
 Broadstone Jr. Excellence, October 16, 2010
 Laney Open, October 30, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 16 | Win | Shivam Vakil | | 6-1; 6-0 | | Q | Win | James Chen | | 6-2; 6-1 | | S | Win | Daniel Deuel | | 6-1; 6-2 | | F | Loss | Cody Rakela | | 6-4; 6-0 |
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Marin Veterans Day Jr. Open, November 11, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 16 | Win | Jacob Gollub | | 6-0; 6-1 | | Q | Win | Parker Silverman | | 6-2; 6-1 | | S | Win | Kenny Stark | | 6-3; 6-3 | | F | Loss | Nathan Oppenheim | | 6-3; 2-6; 10-8 |
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Hunter Gallaway's Holiday Open, December 4, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 16 | Win | Jeffrey Vulis | | 8-1 | | Q | Win | Peter Martin | 1068 | 8-1 | | S | Win | Jonathan Pike | + | 8-4 | | F | Loss | Sean Alves | 95 | 8-3 |
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Santa Cruz Acad. Christmas Tourn., December 26, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | Q | Win | Cameron Hicks | | Wd (emerg)WI* | | S | Win | Matthew Campana | + | 5-7; 6-3; 1-0(6) | | F | Loss | Tytus Chen | | 6-2; 6-4 |
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South Bay End of Year, December 29, 2010
 + Strong win over an ineligible player. * The ranking calculation does not count this match.
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