| ITF - M15 - Antalya | 03/01 10:55 | 25 | Johan Nikles v Andrea Bacaloni | Retired | |
| ITF - M15 - Antalya | 02/22 07:00 | 25 | Stefan Popovic v Johan Nikles | 6-3,1-6,6-4 | |
| Challenger - Vilnius | 10/17 16:35 | 25 | Johan Nikles v Edas Butvilas | 6-3,6-7,1-6 | |
| ATP - Gijón | 10/08 17:05 | 14 | [336] Johan Nikles v Nikolas S Izquierdo [275] | 2-6,6-1,1-6 | |
| Challenger - Lissabon | 09/25 10:50 | 14 | [275] Johan Nikles v Remy Bertola [448] | Retired | |
| Challenger - Sibiu | 09/22 12:45 | 26 | [192] Damir Dzumhur v Johan Nikles [275] | 6-4,6-3 | |
| Challenger - Sibiu | 09/20 10:10 | 25 | [258] Kai Wehnelt v Johan Nikles [275] | 4-6,5-7 | |
| Challenger - Stettin | 09/12 10:35 | 19 | [274] Johan Nikles v Rudolf Molleker [397] | 5-7,3-6 | |
| Challenger - Stettin | 09/11 11:10 | 14 | Johan Nikles v Szymon Kielan | 6-2,6-2 | |
| Challenger - Toulouse | 08/30 08:30 | 25 | [274] Johan Nikles v Louis Wessels [294] | 3-6,6-2,5-7 | |
| Challenger - Banja Luka | 08/22 14:35 | 25 | [349] Viktor Durasovic v Johan Nikles [268] | 6-0,6-3 | |
| Challenger - Zug | 07/25 13:30 | 25 | [261] Johan Nikles v Dimitar Kuzmanov [189] | 4-6,4-6 | |
| ATP - Hamburg | 07/16 10:30 | 26 | [117] Daniel Elahi Galan v Johan Nikles [256] | 6-3,6-7,6-1 | |
| Challenger - Amersfoort | 07/11 09:00 | 19 | [256] Johan Nikles v Arthur Fils [346] | 2-6,6-7 | |
| Challenger - Amersfoort | 07/10 10:10 | 45 | Johan Nikles v Thomaz Bellucci | 6-4,5-7,6-1 | |
| Challenger - Troyes | 06/28 13:40 | 25 | [382] Francesco Maestrelli v Johan Nikles [259] | 6-1,7-5 | |
| Challenger - Oeiras | 06/23 09:00 | 26 | [260] Johan Nikles v Alex Rybakov [327] | 6-4,4-6,3-6 | |
| Challenger - Oeiras | 06/21 10:00 | 25 | [260] Johan Nikles v Ergi Kirkin [305] | 4-6,6-3,6-0 | |
| Challenger - Bratislava | 06/09 11:15 | 26 | [146] Vit Kopriva v Johan Nikles [281] | 6-1,6-4 | |
| Challenger - Bratislava | 06/07 13:55 | 25 | [255] Vitaliy Sachko v Johan Nikles [281] | 6-3,3-6,4-6 | |
| Challenger - Bratislava | 06/06 10:10 | 19 | [281] Johan Nikles v Jonathan Mridha [462] | 6-2,4-6,6-2 | |
| Challenger - Bratislava | 06/05 14:05 | 14 | [276] Johan Nikles v Gergely Madarasz [449] | 6-4,7-6 | |
| Challenger - Posen | 05/29 12:35 | 14 | [277] Johan Nikles v Elmar Ejupovic [419] | 3-6,4-6 | |
| ATP - Genf | 05/18 13:25 | 26 | [64] Tallon Griekspoor v Johan Nikles [317] | 6-3,7-5 | |
| ATP - Genf | 05/17 13:20 | 25 | [301] Leandro Riedi v Johan Nikles [317] | 7-5,6-7,5-7 | |
| ATP - Genf | 05/15 09:00 | 19 | [294] Johan Nikles v Lukas Rosol [249] | 6-4,6-4 | |
| ATP - Genf | 05/14 09:00 | 14 | [99] Peter Gojowczyk v Johan Nikles [294] | 3-6,3-6 | |
| Challenger - Split | 04/19 08:30 | 25 | [209] Luca Nardi v Johan Nikles [294] | 6-4,6-3 | |
| Challenger - Split | 04/18 08:30 | 19 | [294] Johan Nikles v Bogdan Bobrov [470] | 6-4,7-5 | |
| Challenger - Split | 04/17 08:00 | 14 | [294] Johan Nikles v Alexandar Lazarov [411] | 6-3,7-5 |
Johan Nikles (* 23. März 1997 in Genf) ist ein Schweizer Tennisspieler.