They´ve had Knockout Sprints also at the World Cup level, for example this one
in Göteborg 2011. Mens Semifinal featuring Mattias Mueller, Fredric Tranchand, Jerker Lysell, Gustav Bergman, Öystein Kvaal-Österböe and Aleksej Bortnik. Everything was shown on Swedish Television.
Correction; This wasn't actually a WC event but part of NORT (Nordic Orienteering Tour) that year,