| |  | 
  | |  |
 |  |  | | Jai Yoon (USA) |  | | Residence: | Oakland Gardens, NY |
| Birthplace: | Unknown | | Age: | Unknown | | Height: | Unknown | | Plays: | Unknown | | Coaching: | Unknown |  | | Complete Bio | |
L1 Eastern Designated Closed Chmps., January 7, 2005
 Columbus Indoor, February 5, 2005
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 32 | Loss | Tim Wu | 202 | 6-4; 3-6; 7-6 | | 1 | Win | Shankar Ramaswamy | 321 | 6-7; 7-6; 11-9 | | 2 | Loss | Stephen Havens | | 6-4; 6-2 |
|  |  |
USTA National Opens, February 17, 2005
 L1 Eastern Designated Closed Chmps., February 18, 2005
 L1 Eastern Designated Closed Chmps., March 4, 2005
 The Easter Bowl, USTA Nat.Spring Chmps., April 9, 2005
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 128 | Loss | Jared Pinsky | 5 | 6-2; 6-4 | | 1 | Win | William Lang | + | 6-1; 6-1 | | 2 | Loss | Justin Tzou | | 6-2; 6-1 |
|  |  |
L1 Eastern Designated Closed Chmps., April 22, 2005
 L1 Eastern Designated Closed Chmps., May 20, 2005
 USTA National Opens, May 21, 2005
 The Florida Open Chmps., June 25, 2005
 USTA National Opens, July 2, 2005
 Southern Boys' & Girls' 18 Open, July 9, 2005
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 256 | Win | Jeffrey Chudacoff | | 6-4; 6-0 | | 128 | Win | Scott Myers | + | 6-4; 2-6; 6-4 | | 64 | Loss | Andrew Orban | | 6-1; 6-3 | | 3 | Win | Stephen Sullivan | | 6-2; 6-0 | | 4Q | Win | Peter Del Moral | | 6-0; 6-2 | | 4 | Win | Jordan Walters | | Wo (ill)WoI* | | 5Q | Win | Jonathan Spero | + | 3-6; 6-1; 6-1 | | 5 | Loss | Luke Rassow-Kantor | | 7-6(3)); 7-5 |
|  |  |
USTA B18-16 National Clay Court Chmps., July 17, 2005
 USTA Zone Team Chmps., July 27, 2005
 USTA Boys' 18,16 National Chmps., August 5, 2005
 L1 Eastern Des. Closed Winter Chmps., September 9, 2005
 L1 Eastern Des. Closed Chmps., September 30, 2005
 L1 Eastern Des. Closed Chmps., October 14, 2005
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 128 | Win | Maxx Wattenberg | | 6-2; 6-4 | | 64 | Win | Jeremy Feldman | + | 6-2; 6-3 | | 32 | Loss | Charlie Brosens | | 6-4; 7-5 |
|  |  |
L1 Eastern Des. Closed Chmps., October 28, 2005
  |  |  Rnd |  Result |  Opponent |  Rank |  Score | | 64 | Win | Teddy Tesker | | 6-0; 6-0 | | 32 | Loss | Ken Matsumoto | | 6-3; 6-2 | | 32 | Win | Maxx Wattenberg | | 6-3; 6-2 | | 16 | Win | Alex Leeser | | 6-1; 6-1 | | 1 | Win | Michael Reiss | | Wd (inj)WJ* | | 2 | Win | Peter Odell | + | 6-3; 6-2 | | CQ | Win | Chris Post | 257 | 6-2; 6-0 |
|  |  |
USTA National Winter Chmps., December 27, 2005
 + Strong win over an ineligible player. * The ranking calculation does not count this match.
| |  |  | |