| ITF M15 Heraklion | 10/15 09:06 | - | Johan Nikles v Ioannis Kountourakis | 6-1,6-7,7-6 | |
| ITF M15 Heraklion | 10/12 07:00 | - | Johan Nikles v Mario G Fernandez | 6-3,6-2 | |
| ITF M15 Heraklion | 10/11 08:00 | - | [384] Petr Nesterov v Johan Nikles [475] | 2-6,0-6 | |
| ITF M15 Heraklion | 10/10 09:45 | - | Johan Nikles v Fons Van Sambeek | 6-3,6-1 | |
| ITF M15 Heraklion | 10/09 07:00 | - | Johan Nikles v Jeffrey Fradkin | 6-4,6-1 | |
| ITF M15 Heraklion | 10/08 08:30 | - | Johan Nikles v Rocco Piatti | 6-4,6-0 | |
| Challenger Villena | 09/28 13:40 | 14 | [481] Johan Nikles v Neil Oberleitner [450] | 5-7,3-6 | |
| ITF M25 Lausanne | 09/06 11:30 | - | Johan Nikles v Henry Bernet | 3-6,6-7 | |
| ITF M25 Lausanne | 09/05 10:27 | - | Johan Nikles v O'Hare/ Salisbury | 1-6,6-3,6-4 | |
| ITF M25 Lausanne | 09/04 11:32 | - | Johan Nikles v Aleksandra Draganova | 7-6,6-2 | |
| ITF M25 Lausanne | 09/03 09:30 | - | Johan Nikles v Mateja Stanisavljevic | 6-2,5-2 | |
| ITF M25 Sion | 08/29 09:30 | - | [439] Johan Nikles v Damien Wenger [486] | 6-3,5-7,6-7 |
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.