| Portugal F4, Singles Qualifying | 05/06 12:35 | - | 팔카오, 곤칼로 v 니클레스, 조한 | 3-6,7-5,3-6 | |
| ITF Switzerland F2 | 03/19 12:00 | - | 니클레스, 조한 v Haenle, Pirmin | 4-6,2-6 | |
| ITF Switzerland F2 | 03/17 13:30 | - | 우르수, 바딤 v 니클레스, 조한 | 6-3,4-6,4-6 | |
| ITF Switzerland F1 | 03/11 16:00 | - | 마르티, 얀 v 니클레스, 조한 | 3-6,6-4,6-1 | |
| ITF Switzerland F1 | 03/10 16:10 | - | 니클레스, 조한 v Wagner, Bastian | 6-2,5-7,6-1 | |
| ITF Turkey F3 | 02/26 11:40 | - | 니클레스, 조한 v 스테브, 세드릭-마르셀 | 1-6,6-1,0-6 | |
| ITF Turkey F3 | 02/22 08:00 | - | 니클레스, 조한 v Rivera Caballero, Mauricio | 6-3,6-2 | |
| ITF Turkey F7 | 02/16 07:00 | - | 니클레스, 조한 v 가우, 신 | 2-6,1-6 | |
| ITF Turkey F7 | 02/14 07:00 | - | Kapshuk, Artem v 니클레스, 조한 | 7-6,1-6,1-6 | |
| ITF Switzerland F5 | 08/26 15:55 | - | 니클레스, 조한 v Montero, Jorge | 4-6,1-6 | |
| ITF Switzerland F4 | 08/22 14:00 | - | 니클레스, 조한 v Rousset, Elie | 2-6,3-6 | |
| ITF Switzerland F4 | 08/21 16:30 | - | 니클레스, 조한 v Perret, Loic | 6-3,6-2 | |
| ITF Switzerland F4 | 08/20 13:00 | - | 니클레스, 조한 v Kahoun, Jacob | 7-6,7-5 | |
| ITF Switzerland F4 | 08/18 14:45 | - | 크레팔디, 에리크 v 니클레스, 조한 | 2-6,6-4,5-7 | |
| ITF Switzerland F3 | 08/12 09:00 | - | 호앙, 안토인 v 니클레스, 조한 | 6-2,6-1 |
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.