| Challenger - Lima | 09/28 15:00 | 25 | [380] Johan Nikles v Adrian Menendez-Maceiras [301] | 6-4,6-2 | |
| Challenger - Lima | 09/27 15:00 | 19 | [380] Johan Nikles v Oscar Jose Gutierrez [355] | 6-4,6-2 | |
| Challenger - Lima | 09/26 21:20 | 14 | Johan Nikles v Gianluca Ballotta | 6-0,6-3 | |
| Challenger - Ambato | 09/24 17:40 | 27 | [410] Johan Nikles v Juan Pablo Ficovich [236] | 6-0,6-7,5-7 | |
| Challenger - Ambato | 09/22 18:40 | 26 | [325] Pedro Sakamoto v Johan Nikles [410] | 3-6,4-6 | |
| Challenger - Ambato | 09/21 17:40 | 25 | [394] Pol M Tiffon v Johan Nikles [410] | 5-7,6-7 | |
| Challenger - Quito | 09/14 15:00 | 25 | [409] Johan Nikles v Alexis Gautier [444] | 0-6,4-6 | |
| ITF - M25 Oviedo | 09/02 10:20 | 27 | [410] Johan Nikles v Alvaro Lopez San Martin [398] | 6-7,6-4,5-7 | |
| ITF - M25 Oviedo | 09/01 14:20 | 26 | Johan Nikles v Julio Cesar Porras | 7-5,6-4 | |
| ITF - M25 Oviedo | 08/31 10:00 | 25 | [410] Johan Nikles v Federico Zeballos [244] | 7-6,6-2 | |
| Challenger - Varsovia | 08/25 10:30 | 25 | [409] Johan Nikles v Jozef Kovalik [121] | 3-6,4-6 | |
| Challenger - Varsovia | 08/24 11:30 | 19 | Johan Nikles v Jonathan Mridha | 6-4,6-7,6-3 | |
| Challenger - Varsovia | 08/22 13:35 | 14 | [412] Johan Nikles v Lucas Gerch [486] | 6-4,7-5 | |
| ATP Gstaad | 07/19 10:30 | 25 | [409] Johan Nikles v Vit Kopriva [249] | 2-6,1-6 | |
| Challenger - Amersfoort | 07/15 18:05 | 26 | [435] Johan Nikles v Lukas Rosol [214] | 2-6,1-6 | |
| Challenger - Amersfoort | 07/13 10:15 | 25 | [343] Ryan Nijboer v Johan Nikles [435] | 6-7,2-6 | |
| Challenger - Amersfoort | 07/12 09:00 | 19 | [381] Jeremy Jahn v Johan Nikles [435] | 2-6,3-6 | |
| Challenger - Amersfoort | 07/11 14:00 | 14 | Dominik Palan v Johan Nikles | 4-6,6-7 | |
| ITF - M25 Haga | 07/03 08:00 | 28 | [335] Javier Barranco Cosano v Johan Nikles [458] | 7-5,6-4 | |
| ITF - M25 Haga | 07/02 10:30 | 27 | [436] Mateus D C C Alves v Johan Nikles [458] | 2-6,6-7 | |
| ITF - M25 Haga | 07/01 10:50 | 26 | [458] Johan Nikles v Julian Ocleppo [355] | 6-4,6-1 | |
| ITF - M25 Haga | 06/30 13:50 | 25 | [458] Johan Nikles v Louis Wessels [470] | Retired | |
| ITF M25 - Klosters | 06/23 09:25 | 25 | [471] Johan Nikles v Aziz Dougaz [353] | 2-6,7-6,3-6 | |
| ITF - M15 Genova | 06/20 08:00 | 29 | Johan Nikles v Luca Nardi | 4-6,2-6 | |
| ITF - M15 Genova | 06/19 15:00 | 28 | Edoardo Eremin v Johan Nikles | 2-6,3-6 | |
| ITF - M15 Genova | 06/18 11:30 | 27 | Johan Nikles v Dragos Nicolae Madaras | 7-5,3-6,7-5 | |
| ITF - M15 Genova | 06/17 08:00 | 26 | Johan Nikles v Pedro B Dias | 6-3,6-3 | |
| ITF - M15 Genova | 06/16 08:00 | 25 | Johan Nikles v Maxime Mora | 6-2,6-0 | |
| ITF - M25 Vic | 05/19 11:40 | 25 | [470] Johan Nikles v Roberto Ortega-Olmedo [301] | Retired | |
| ITF - M25 Vic | 05/18 09:35 | 62 | Johan Nikles v Miguel Damas | 6-3,7-6 |
Johan Nikles (born 23 March 1997) is a Swiss tennis player.
Nikles has a career high ATP singles ranking of World No. 256 achieved on 11 July 2022. He also has a career high ATP doubles ranking of World No. 357 achieved on 3 October 2022.
On the junior tour, Nikles has a career high ITF junior ranking of No. 26 achieved in January 2015.
Nikles made his ATP main draw debut at the 2016 Swiss Open Gstaad, receiving a singles main draw wildcard.
He qualified for the 2022 Geneva Open defeating 3rd seed Peter Gojowczyk and 8th seed Lukáš Rosol and won his first ATP singles main draw match against compatriot wildcard Leandro Riedi saving three match balls. He lost to Tallon Griekspoor in the second round. As a result he moved 40 positions up into the top 300.