Switzerland have scored six goals in their first three group games.
Pierluigi Tami's men have yet to concede a goal in the tournament.
Admir Mehmedi leads the Swiss scoring charts with two goals.
Switzerland gave up less than a goal a game (0.83) in the qualifying phase.
Czech Republic won the European Under-21 Championships in 2002.
Jakub Dovalil's men were on the verge of elimination before two late goals against England saw them progress to the semi-finals.
The Czechs have committed 64 fouls and have picked up nine bookings in three games.
Borek Dockal leads the team in scoring with two goals in the competition.
PROBABLE LINE-UPS
Switzerland (4-4-2)
Sommer; Koch, Rossini, Klose, Berardi; Lustenberger, Frei, Shaqiri, Abrashi; Emeghara, Gavranovic
Basel youngster Granit Xhaka will miss the semi-final encounter after picking up one yellow card too many and will likely be replaced by Amir Abrashi.
Czech Republic (4-4-2)
Vaclik; Lecjaks, Mazuch, Celustka, Suchy; Dockal, Vacha, Marecek, Kovarik; Kozac, Pekhart
Lukas Vacha will likely return to claim his place in midfield after missing the 2-1 win over England through suspension. Tomas Pekhart could be handed a start after his injury-time heroics against the English.
Prediction
The Swiss will concede their first goal of the tournament but have enough firepower upfront to punch their ticket to the final.
Switzerland Under 21 2-1 Czech Republic Under 21 
