USA
15.06.93, 31 years
19894 $
15.06.93, 31 years
19894 $
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
Canada
20.07.90, 34 years
20.07.90, 34 years
Collin Johns vs. Kieran Bertsch - head to head matches
| 08.07.13 | q 1 | Collin Johns | Kieran Bertsch | 6-3, 6-4 | match details |  Canada F4 | Hard |
Collin Johns form & Kieran Bertsch form
Collin Johns - last matches
 USA F18 - Clay | ||||
| 26.06.18 1st round | vs. Junior A. Ore | 4-6, 6-3, 3-6 |  | match details |
| USA F16 - Clay | ||||
| 22.06.18 1/4 | vs. Gianni Ross | 4-6, 4-6 | | match details |
| 21.06.18 2nd round | vs. Isaiah Strode | 7-62, 6-1 |  | match details |
| 20.06.18 1st round | vs. Maksim Tikhomirov | 6-2, 6-2 | | match details |
| USA F14 - Clay | ||||
| 12.06.18 1st round | vs. Markos Kalovelonis | 4-6, 3-6 | | match details |
| USA F12 - Clay | ||||
| 25.04.18 1st round | vs. Jordi Arconada | 2-6, 4-6 | | match details |
| USA F11 - Clay | ||||
| 17.04.18 1st round | vs. Ricardo Rodriguez-Pace | 3-6, 2-6 | | match details |
 Israel F3 - Hard | ||||
| 21.03.18 1st round | vs. Mor Bulis | 2-6, 3-6 | | match details |
| Israel F2 - Hard | ||||
| 11.03.18 q 1 | vs. Gilad Tamar | 0-4, - Collin Johns - retired | | match details |
| Israel F1 - Hard | ||||
| 06.03.18 1st round | vs. Yannick Vandenbulcke | 0-6, 3-6 | | match details |
| 05.03.18 qual. | vs. Motvey Radionov | 6-3, 6-4 | | match details |
| 04.03.18 q 2 | vs. Amit Cohen | 6-0, 6-0 | | match details |
| USA F6 - Clay | ||||
| 31.01.18 1st round | vs. Frederico Gil | 0-6, 2-6 | | match details |
| 30.01.18 qual. | vs. Juan Alejandro Hernandez | 6-1, 6-76, 6-73 | | match details |
| 28.01.18 q 2 | vs. Alexandre Leblanc | 6-2, 6-3 | | match details |
| 28.01.18 q 1 | vs. Nestor Vargas | 6-0, 6-2 | | match details |
| USA F3 - Clay | ||||
| 11.01.18 2nd round | vs. Javier Marti | 2-6, 4-6 | | match details |
| 09.01.18 1st round | vs. Aron Hiltzik | 6-1, 3-6, 6-1 | | match details |
 Dominican Republic - Hard | ||||
| 04.12.17 q 1 | vs. Brian Healy | 6-0, 6-0 | | match details |
| 04.12.17 q 2 | vs. Daniel Alonte | 6-0, 6-0 | | match details |
| 04.12.17 qual. | vs. Lukas Greif | 6-4, 4-6, 0-2, - Collin Johns - retired | | match details |
| Dominican Republic - Hard | ||||
| 30.11.17 1/4 | vs. Jose Hernandez-Fernandez | 2-6, 4-6 | | match details |
| 29.11.17 2nd round | vs. Lukas Greif | 6-3, 6-2 | | match details |
| 28.11.17 1st round | vs. Rowland Phillips | 6-3, 5-7, 6-2 | | match details |
| USA F37 - Clay | ||||
| 14.11.17 1st round | vs. William Grant | 4-6, 3-6 | | match details |
| USA F36 - Clay | ||||
| 08.11.17 1st round | vs. Matias Zukas | 4-6, 2-6 | | match details |
| 06.11.17 qual. | vs. Alberto Barroso Campos | 6-4, 6-3 | | match details |
| 06.11.17 q 1 | vs. Jakub Wojcik | 6-4, 6-1 | | match details |
| 06.11.17 q 2 | vs. Arnav Dhingra | 6-3, 6-0 | | match details |
 Romania F12 - Clay | ||||
| 30.08.17 1st round | vs. Franco Agamenone | 4-6, 1-6 | | match details |
Kieran Bertsch - last matches
 Turkey F21 - Hard | ||||
| 23.05.16 q 2 | vs. David De Leon Elias | 4-6, 4-6 | | match details |
| Turkey F20 - Hard | ||||
| 16.05.16 q 1 | vs. Yuriy Rogusskiy | 1-6, 3-6 | | match details |
| Turkey F19 - Hard | ||||
| 09.05.16 q 1 | vs. Jordan Hefti | 5-7, 5-7 | | match details |
| Canada F4 - Hard | ||||
| 29.06.15 qual. | vs. Kelvin Kim | 3-6, 0-6 | | match details |
| 29.06.15 q 2 | vs. Austin Hoole | 3-6, 7-67, 6-3 | | match details |
| 29.06.15 1st round | vs. Marcos Giron | 2-6, 1-6 | | match details |
| 29.06.15 q 1 | vs. Robert Oleksiuk | 6-1, 6-3 | | match details |
| Canada F3 - Hard | ||||
| 22.06.15 q 1 | vs. Wesley Bertsch | 5-7, 2-6 | | match details |
| Canada F4 - Hard | ||||
| 08.07.13 q 1 | vs. Collin Johns | 3-6, 4-6 | | match details |
| Canada F3 - Hard | ||||
| 01.07.13 q 2 | vs. Nicholas Kamisar | 6-3, 1-6, 0-6 | | match details |
| USA F7 - Hard | ||||
| 11.03.13 q 1 | vs. Tucker Vorster | 1-6, 1-6 | | match details |