| ITF M25 Sion | 08/29 09:30 | - | [439] Johan Nikles v Damien Wenger [486] | 6-3,5-7,6-7 | |
| ITF M25 Sion | 08/28 11:50 | - | Johan Nikles v Timofey Stepanov | 3-6,6-2,7-6 | |
| ITF M25 Sion | 08/27 10:57 | - | Johan Nikles v Eysseric/Martin | 6-3,5-3 | |
| ITF M25 Muttenz | 08/23 12:02 | - | Johan Nikles v Henry Bernet | 7-6,4-6,4-6 | |
| ITF M25 Muttenz | 08/22 12:30 | - | [400] Johan Nikles v Carlo A Caniato [489] | 6-4,6-2 | |
| ITF M25 Muttenz | 08/21 08:45 | - | Johan Nikles v Sebastian Fanselow | 6-4,6-0 | |
| ITF M25 Muttenz | 08/20 12:47 | - | Johan Nikles v Gian Gruenig | 6-1,6-4 | |
| Challenger Liberec | 07/27 12:10 | 14 | [384] Alex Molcan v Johan Nikles [447] | 1-6,6-1,6-1 | |
| ITF M25 Ollersbach | 07/24 10:33 | - | Johan Nikles v Sebastian Sorger | 6-3,4-6,0-5 | |
| ITF M25 Ollersbach | 07/23 12:32 | - | Johan Nikles v Benedikt Szerencsits | 6-3,6-4 | |
| ITF M25 Uriage | 07/18 11:58 | - | Marat Sharipov v Johan Nikles | 6-3,6-3 | |
| ITF M25 Uriage | 07/17 08:00 | - | Centro Espanol de Plottier v Johan Nikles | 7-5,4-6,4-6 |
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 had 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 points. He lost to Tallon Griekspoor in the second round. As a result he moved 40 positions up into the top 300.