Brentford striker Nikos Karelis will be out for a "significant" time after suffering a serious knee injury, the Championship club have confirmed.
The Greece international, 27, went off in the Bees' win over Millwall on 19 October - his first start for the club - and will have surgery next month.
Karelis joined Brentford on a one-year deal in August after leaving Belgian side Genk earlier in the summer.
He has made four appearances for Thomas Frank's 13th-placed side.
Brentford face London rivals QPR at the Kiyan Prince Foundation Stadium on Monday.