| |  | 
  | |  |
 |  |  | | Nathan Tjen |  | | Residence: | Irvine, CA |
| Birthplace: | Unknown | | Age: | Unknown | | Height: | Unknown | | Plays: | Unknown | | Coaching: | Unknown |  | | Complete Bio | |
20th La Habra Winter Satellite, January 9, 2010
 7th Ramada BG18-8 Open Tourn., February 6, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 64 | Loss | Adam Kane | | 6-3; 7-6(5) |
|  |  |
18th Dana Hills Easter Satellite, March 27, 2010
 26th Anaheim TC Tourn., May 1, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 128 | Loss | Juan Aragone | 311 | Wd (inj)WJ* |
|  |  |
Lakewood Satellite Tourn., June 26, 2010
 11th Chapman Univ. Jr. Open, July 10, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 64 | Loss | Kevin Lallu | 3664 | 6-3; 1-6; 6-3 |
|  |  |
Canyon Crest Summer Open Tourn., July 17, 2010
 Lakewood Jr. Open, July 24, 2010
 Nellie Gail Summer Sat. Tourn., July 31, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | Q | Loss | Chris Hauser | | 7-6; 3-6; 10-7 |
|  |  |
34th Cerritos Summer Jr. Tourn., August 7, 2010
 12th Upland Jr. Tourn., August 14, 2010
 32nd Racquet Centre Open Tourn., August 21, 2010
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 64 | Loss | Ryan Chung | | 6-4; 6-3 |
|  |  |
The Orange County Jr. Open, October 23, 2010
 19th Westcoast Winter Tourn., November 20, 2010
 Lakewood Jr. Open & Sat. Tourn., December 11, 2010
 DesertArc Fundraiser Tourn., December 21, 2010
 * The ranking calculation does not count this match.
| |  |  | |