| |  | 
  | |  |
 |  |  | | Mason Vierra |  | | Residence: | Monterey, CA |
| Birthplace: | Unknown | | Age: | Unknown | | Height: | Unknown | | Plays: | Unknown | | Coaching: | Unknown |  | | Complete Bio | |
USTA National Winter Chmps., December 27, 2008
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 128 | Loss | Sean Karl | | 1-6; 6-3; 6-2 | | 1 | Win | Matt Stachowiak | | 6-0; 6-0 | | 2 | Win | Nicholas Reyes | 79 | 6-3; 6-2 | | 3Q | Win | Adam Liu | | 6-1; 6-7(9); 6-1 | | 3 | Loss | Gregory Garcia | 13 | 7-6(4); 6-1 |
|  |  |
Copper Bowl, January 2, 2009
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 128 | Win | Brady Straus | + | 6-1; 6-1 | | 64 | Win | Jake Yasgoor | 262 | 6-0; 6-0 | | 32 | Win | John Haffey | 136 | 6-2; 6-2 | | 16 | Loss | Balaji Jothishankar | | 7-6(4); 6-3 | | 4 | Win | Michael Brewer | | 6-0; 4-6; 10-4 | | QQ | Win | Jordan Daigle | + | 7-5; 6-3 | | CQ | Loss | Gage Brymer | 21 | 6-7(3); 6-1; 10-1 |
|  |  |
Carmel Valley AC Open BG18-10, January 31, 2009
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Win | Hong Suh | | 6-0; 6-0 | | 16 | Win | Jesse Nelson | | 6-0; 6-1 | | Q | Win | Kyle Coates | | 6-0; 6-2 | | S | Win | Sumant Sabada | | 6-3; 6-3 | | F | Loss | Richard Pham | 33 | 6-4; 6-2 |
|  |  |
Seascape President's Day Open/Chal., February 14, 2009
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Win | Kenneth Tao | 185 | 6-2; 6-0 | | 16 | Win | Derek Tzeng | | 6-4; 7-5 | | Q | Win | Matthew Ledoux | | 6-1; 6-1 | | S | Loss | Trevor Unger | | 6-1; 6-2 |
|  |  |
Chamisal Jr. Open & Novice, February 28, 2009
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | Q | Win | Hong Suh | | 6-0; 6-1 | | S | Win | Phillip Kim | | 6-0; 6-1 | | F | Win | Alexander Kahle | | 6-1; 6-0 |
|  |  |
Modesto Jr. Chmps., March 14, 2009
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 64 | Win | Bruneil Chamaki | | 6-3; 6-0 | | 32 | Win | Kevin Chen | | 6-3; 6-2 | | 16 | Loss | Jayabharath Billa | | 7-6(4); 6-3 |
|  |  |
Monterey Bay Jr. Op., Chal., & Nov., March 28, 2009
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | S | Win | Michael Standifer | | 6-1; 6-1 | | F | Win | Matthew Ledoux | | 6-1; 6-2 |
|  |  |
The Easter Bowl Spring Nat'l, April 12, 2009
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 128 | Loss | Cristobal Rivera | | 6-2; 6-1 | | 1 | Loss | Alexander Wallace | | 6-2; 6-1 |
|  |  |
Rio Del Oro Chmp. Tourn., April 25, 2009
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 64 | Loss | Lovedeep Singh | | 6-3; 6-2 |
|  |  |
Fremont TC BG18-10 Open, May 9, 2009
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Win | Isaiah Pekary | | 6-1; 6-0 | | 16 | Win | Garrick Dzoan | 334 | 6-2; 6-1 | | Q | Win | Stuart Miller | | 6-1; 6-0 | | S | Loss | Eric Johnson | | 6-2; 6-2 | | PL | Win | Maksym Tsvetkov | | 6-3; 0-6; 6-3 |
|  |  |
Spare Time Mem. Day Jr. Excellence, May 23, 2009
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Win | Maksym Tsvetkov | | 6-3; 6-1 | | 16 | Loss | Matthew Roberts | | 6-1; 6-1 | | 2 | Loss | Max Vogt | | 6-3; 6-4 |
|  |  |
Santa Cruz Acad. Open/Novice, June 12, 2009
 NorCal BG14 Sectional Chmps., June 15, 2009
 Seascape Summer Kickoff Open, June 27, 2009
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 16 | Win | Seth Hein | | 6-1; 6-0 | | Q | Win | Kyle Richter | | 6-3; 6-0 | | S | Loss | Jordan Kepler | | 6-3; 6-4 | | PL | Loss | Matthew Roberts | | 6-0; 6-2 |
|  |  |
USTA National Opens, July 4, 2009
 Tiburon Summer Jr. Open, July 10, 2009
 USTA B14 National Clay Court Chmps., July 19, 2009
 West Coast Chmps., August 3, 2009
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 128 | Win | Jimmy Fernandez | | 6-0; 6-0 | | 64 | Win | Brian Sun | + | 6-4; 6-2 | | 32 | Loss | Trevor James | | 6-1; 6-0 | | 3 | Win | Jack McCullers | + | 6-4; 6-0 | | 4Q | Win | Tanner Schmutte | | 6-1; 6-2 | | 4 | Win | Justin Chan | + | 6-3; 6-1 | | QQ | Loss | Austin Wood | | Wd (inj)WJ* |
|  |  |
USTA B14 National Chmps., August 9, 2009
 Courtside Jr. Chmp., September 19, 2009
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 64 | Win | Nicholas Yuk | | 6-1; 6-3 | | 32 | Loss | Viswajit Simhadri | | Wd (inj)WJ* |
|  |  |
Legler-Roberts Tennis Chmps., October 31, 2009
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Loss | Thomas Stirling | | 6-4; 6-4 |
|  |  |
USTA National Open, November 26, 2009
 California Bowl, December 19, 2009
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 64 | Loss | Alex Scheinman | | 6-3; 6-4 | | 1 | Win | Justin Vijungco | | 6-2; 6-3 | | 2 | Win | Thomas Stirling | | 6-2; 6-0 | | 3 | Win | Steven McMullan | + | 6-2; 2-6; 4-1Ret (inj)RJ | | CQ | Win | Aidan Talcott | 40 | 6-2; 6-2 | | CS | Loss | Jacob Imam | | 6-3; 6-2 |
|  |  |
+ Strong win over an ineligible player. * The ranking calculation does not count this match.
| |  |  | |