| ITF M25 Hammamet | 04/16 12:40 | 25 | 푸르네스, 에반 v 니클레스, 조한 | 6-2,7-5 | |
| ITF M25 Hammamet | 04/11 08:30 | 26 | 니클레스, 조한 v 킴, 제로미 | 7-6,4-6,1-6 | |
| ITF M25 Hammamet | 04/10 10:10 | 25 | 와타나베, 세이타 v 니클레스, 조한 | 6-7,4-6 | |
| ITF M25 Hammamet | 04/08 13:15 | 62 | 니클레스, 조한 v Matteo Fondriest | 6-3,6-3 | |
| Challenger Barletta | 03/31 10:20 | 14 | 델라베도바, 마튜 v 니클레스, 조한 | 6-1,7-5 | |
| Zadar, Croatia | 03/18 09:00 | 19 | 니클레스, 조한 v Arthur Gea | 1-6,4-6 | |
| Zadar, Croatia | 03/17 10:45 | 14 | 델라베도바, 마튜 v 니클레스, 조한 | Retired | |
| ITF M15 Rovinj | 03/12 12:05 | 25 | 니클레스, 조한 v 포포비치, 스테판 | 6-3,3-6,2-6 | |
| Challenger Lugano | 03/05 17:15 | 25 | 일켈, 켐 v 니클레스, 조한 | 6-0,6-3 | |
| ITF M25 Hammamet | 02/21 13:30 | 25 | 니클레스, 조한 v 노스, 가브리엘 마리아 | 6-4,1-6,3-6 | |
| ITF M25 Hammamet | 02/20 09:15 | 62 | 니클레스, 조한 v Kazakov, Ivan | 7-5,6-4 | |
| ITF M25 Hammamet | 02/19 11:00 | 62 | 니클레스, 조한 v Giammarco Gandolfi | 6-0,3-6,10-3 |
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.