Experienced midfielder Steven Zuber picked up a knock to his calf in a 1-1 friendly draw with Austria last weekend and was only able to take part in an individual training session earlier this week, making him a doubt for the clash with Hungary.
Switzerland were boosted by the return to training of Monaco duo Breel Embolo and Denis Zakaria, though, who have both shaken off injury issues and could be in a position to make the matchday squad on Saturday.
Murat Yakin is set to select a three-man defence including Manchester City's Manuel Akanji, with Fabian Schar, Nico Elvedi and Ricardo Rodriguez competing for two of the remaining three centre-back spots.
Captain Granit Xhaka, who won the Bundesliga title with Bayer Leverkusen last season, is expected to start in centre-midfield and could be joined by Remo Freuler, while Silvan Widmer and Dan Ndoye the most likely duo to operate as wing-backs.
Chicago Fire attacker Xherdan Shaqiri could be joined in the final third by Augsburg's Ruben Vargas and Burnley's Zeki Amdouni, who has scored seven goals in 15 international caps, with Noah Okafor, Renato Steffen and Kwadwo Duah all set to provide cover on the substitutes' bench.
Switzerland possible starting lineup: Sommer; Schar, Akanji, Rodriguez; Widmer, Freuler, Xhaka, Ndoye; Shaqiri, Vargas; Amdouni