The meeting was held in Lancy and ended with the score 1:0 in favor of the hosts.
The only goal in the game in the first minute was scored by Haris Seferovic.
For the Swiss, this is the first victory in the current League of Nations.
Switzerland scored three points and continues to close the standings of their group, while Portugal (seven points) fell to second place in the quartet.
Earlier it was reported that the Spanish national team beat the Czech team in the League of Nations match.