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.