The list published on the official website of the Swiss Football Federation includes:

Goalkeepers: Roman Buerki, Gregor Kobel, Yvon Mvogo, Yann Sommer;

Defenders: Manuel Akanji, Johan Djourou, Nico Elvedi, Michael Lang, Stephan Lichtsteiner, Jacques-Francois Moubandje, Ricardo Rodriguez, Fabian Schaer, Silvan Widmer;

Midfielders: Valon Behrami, Blerim Dzemaili, Edimilson Fernandes, Gelson Fernandes, Remo Freuler, Xherdan Shaqiri, Granit Xhaka, Steven Zuber, Denis Zakaria;

Forwards: Josip Drmic, Breel Embolo, Mario Gavranovic, Haris Seferovic.

Switzerland's final 23-man squad will be announced by June 4.

The 2018 FIFA World Cup will be held between June 14 and July 15 at 12 stadiums across 11 Russian cities. Switzerland has been drawn in Group E alongside five-time Wold Cup winners Brazil, Costa Rica and Serbia.