Brentford will listen to offers for Andreas Bjelland and Lasse Vibe in the January transfer window.
The contracts of both Denmark internationals are due to expire in the summer.
Defender Bjelland, 29, has impressed this season and was instrumental in his country’s qualification for the World Cup.
Vibe, 30, has struggled to secure a regular first-team place, largely because of injuries, and has scored two goals in just eight Championship starts this term.