| |  | 
  | |  |
 |  |  | | Alex Sun |  | | Residence: | Irvine, CA |
| Birthplace: | Unknown | | Age: | Unknown | | Height: | Unknown | | Plays: | Unknown | | Coaching: | Unknown |  | | Complete Bio | |
Woodbridge TC Spring Jr. Open Tourn., April 14, 2012
 33rd Lakewood Spring Jr. Open Tourn., May 5, 2012
 16th West Coast Jr. Open & Sat. Tourn., May 26, 2012
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 64 | Win | Rohan Lageweg | + | 6-4; 6-0 | | 32 | Loss | Victor Cheng | 70 | 6-2; 6-1 |
|  |  |
110th So. California Sectional Chmps., June 16, 2012
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 512 | Loss | Curtis Tam | 505 | 6-3; 6-1 |
|  |  |
23rd The Tennis Club Jr. Open Tourn., July 9, 2012
 19th Costa Mesa Summer Jr. Classic, July 16, 2012
 Lakewood Jr. Open & Jr. Satellite Tourn., July 21, 2012
 Woodbridge TC Jr. Satellite Tourn., August 11, 2012
 17th Annual Orange Co. TA Jr. Open Tourn, August 16, 2012
 28th Los Caballeros Jr. Open Tourn., September 8, 2012
 The Orange Co./J.P. Yamasaki Open, October 6, 2012
 21st Westcoast Winter Jr. Open/Sat., November 17, 2012
 Lakewood Open & Satellite Tourn., December 8, 2012
 + Strong win over an ineligible player. * The ranking calculation does not count this match.
| |  |  | |