Johan Nikles (born 23 March 1997) is a Swiss tennis player.

Nikles has a career-high ATP singles ranking of World No.

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[1], and won his first ATP singles main draw match against compatriot wildcard Leandro Riedi, saving three match points.

This biographical article relating to Swiss tennis is a stub.