Country
Birthdate
Height
Weight
Profi since
Play
Ranking's position
Points
Prize money
Birthdate
Height
Weight
Profi since
Play
Ranking's position
Points
Prize money
USA
11.08.91, 33 years
13605 $
11.08.91, 33 years
13605 $
Vasil Kirkov vs. Jonathan Chang - head to head matches
| 23.01.17 | Vasil Kirkov | Jonathan Chang | 7-63, 6-2 | match details |  USA F5 | Clay |
Vasil Kirkov form & Jonathan Chang form
Vasil Kirkov - last matches
 Danderyd Challenger - I. hard | ||||
| 12.11.23 q 1 | vs. Pierre-Hugues Herbert | 4-6, 2-6 |  | match details |
| M15 Naples - Clay | ||||
| 11.02.22 1/4 | vs. Murkel Dellien | 4-6, 4-6 | | match details |
| 10.02.22 2nd round | vs. Alexander Cozbinov | 3-6, 6-3, 7-5 |  | match details |
| 08.02.22 1st round | vs. Preston Stearns | 7-5, 6-1 | | match details |
 Puerto Vallarta - Hard | ||||
| 22.11.21 qual. | vs. Liam Draxl | 1-5, - Vasil Kirkov - retired | | match details |
| 21.11.21 q 1 | vs. Ivar Aramburu Contreras | 6-1, 6-2 | | match details |
| Champaign Challenger - I. hard | ||||
| 19.11.21 1/4 | vs. Jeff Wolf | 3-6, 2-6 | | match details |
| 17.11.21 2nd round | vs. Nick Chappell | 6-2, 6-3 | | match details |
| 15.11.21 1st round | vs. Prajnesh Gunneswaran | 7-5, 6-1 | | match details |
| M15 Ithaca - I. hard | ||||
| 06.11.21 1/2 | vs. Luke Johnson | 1-6, 1-6 | | match details |
| 05.11.21 1/4 | vs. Evan Bynoe | 6-1, 6-1 | | match details |
| 04.11.21 2nd round | vs. Colin Sinclair | 6-3, 6-4 | | match details |
| 03.11.21 1st round | vs. John Mcnally | 6-74, 6-2, 6-1 | | match details |
| M15 Tallahassee - I. hard | ||||
| 31.10.21 fin | vs. Johannes Ingildsen | 4-6, 6-1, 6-2 | | match details |
| 30.10.21 1/2 | vs. Henry Patten | 4-6, 6-3, 6-3 | | match details |
| 29.10.21 1/4 | vs. Ben Shelton | 7-63, 2-6, 6-3 | | match details |
| 28.10.21 2nd round | vs. John Mcnally | 6-4, 6-2 | | match details |
| 27.10.21 1st round | vs. Liam Draxl | 6-3, 6-3 | | match details |
 M25 Prague - I. hard | ||||
| 07.10.21 2nd round | vs. Timo Stodder | 2-6, 1-6 | | match details |
| 06.10.21 1st round | vs. Adam Januska | 6-0, 6-0 | | match details |
| M25 Falun - I. hard | ||||
| 01.10.21 1/2 | vs. Shintaro Imai | 2-6, 5-7 | | match details |
| 30.09.21 1/4 | vs. Antoine Escoffier | 3-6, 6-4, 6-4 | | match details |
| 29.09.21 2nd round | vs. Leopold Zima | 6-4, 6-4 | | match details |
| 27.09.21 1st round | vs. Sergey Fomin | 6-3, 6-2 | | match details |
 M25+H Plaisir - I. hard | ||||
| 18.09.21 1/2 | vs. Alexandre Reco | 5-7, 1-3, - Vasil Kirkov - retired | | match details |
| 17.09.21 1/4 | vs. Thomas Laurent | 7-64, 6-1 | | match details |
| 16.09.21 2nd round | vs. Marvin Moeller | 2-6, 7-66, 7-65 | | match details |
| 14.09.21 1st round | vs. Melvin Manuel | 6-4, 6-2 | | match details |
 Banja Luka - Clay | ||||
| 05.09.21 q 1 | vs. Mircea-Alexandru Jecan | 4-6, 4-6 | | match details |
 M15 Ulcinj - Clay | ||||
| 02.09.21 2nd round | vs. Ignacio Carou | 6-3, 1-6, 4-6 | | match details |
Jonathan Chang - last matches
| USA F33 - I. hard | ||||
| 22.11.18 1/4 | vs. Andrew Watson | 4-6, 6-76 | | match details |
| 21.11.18 2nd round | vs. Cannon Kingsley | 3-6, 6-1, 7-5 | | match details |
| 20.11.18 1st round | vs. Ronnie Schneider | 6-4, 4-6, 6-2 | | match details |
| 18.11.18 qual. | vs. Dillon Early | 6-1, 6-0 | | match details |
| Houston Challenger - Hard | ||||
| 10.11.18 q 1 | vs. Alejandro Gonzalez | 2-6, 3-6 | | match details |
| USA F28b - Hard | ||||
| 26.10.18 1/2 | vs. Roy Smith | 2-6, 2-6 | | match details |
| 25.10.18 2nd round | vs. Michael Redlicki | 6-4, 6-1 | | match details |
| 25.10.18 1/4 | vs. Jack Findel-Hawkins | 4-6, 6-4, 7-63 | | match details |
| 23.10.18 1st round | vs. Lucas Poullain | 6-3, 6-3 | | match details |
| 22.10.18 qual. | vs. Alastair Gray | 6-2, 0-6, 7-64 | | match details |
| 21.10.18 q 2 | vs. Spencer Papa | 3-6, 6-3, 6-1 | | match details |
| USA F28 - Hard | ||||
| 17.10.18 1st round | vs. Oliver Crawford | 1-6, 2-6 | | match details |
| 15.10.18 qual. | vs. Guido Marson | 6-4, 6-2 | | match details |
| 14.10.18 q 2 | vs. Alejandro Vedri Asensi | 6-2, 6-1 | | match details |
| 13.10.18 q 1 | vs. Jonathan Sorbo | 6-0, 6-2 | | match details |
| USA F27 - Hard | ||||
| 10.10.18 1st round | vs. Ryan Peniston | 0-6, 4-6 | | match details |
| 08.10.18 qual. | vs. Tim Ruehl | 6-1, 7-66 | | match details |
| 07.10.18 q 1 | vs. Alexander Knight | 6-3, Alexander Knight - retired | | match details |
| 07.10.18 q 2 | vs. Adam Oscislawski | 6-4, 6-3 | | match details |
| USA F26 - Hard | ||||
| 23.09.18 q 1 | vs. Jonathan Sorbo | 6-2, 6-1 | | match details |
| 23.09.18 q 2 | vs. Robert Kelly | 2-6, 2-6 | | match details |
| Columbus Challenger - I. hard | ||||
| 15.09.18 q 1 | vs. Ricardo Rodriguez-Pace | 4-6, 7-66, 2-6 | | match details |
| USA F21 - Hard | ||||
| 01.08.18 1st round | vs. Martin Joyce | 6-2, 3-6, 2-6 | | match details |
| 31.07.18 q 2 | vs. Alex Blumenberg | 6-2, 6-1 | | match details |
| 31.07.18 qual. | vs. Gage Brymer | 6-4, 6-2 | | match details |
| 29.07.18 q 1 | vs. David Metz | 6-2, 6-0 | | match details |
| USA F20 - Hard | ||||
| 25.07.18 2nd round | vs. Petros Chrysochos | 0-6, 6-3, 4-6 | | match details |
| 24.07.18 qual. | vs. Alexander Cozbinov | 6-3, 6-2 | | match details |
| 24.07.18 1st round | vs. Jenson Brooksby | 6-4, 6-4 | | match details |
| 23.07.18 q 2 | vs. Abhijeet Joshi | 6-1, 6-3 | | match details |