Reporting from AAP

Brisbane playmaker Jock Madden will go for scans on his pectoral injury as star duo Selwyn Cobbo and Ezra Mam race the clock to be fit for the Broncos' grudge clash with the Sydney Roosters.

Madden, playing five-eighth, left the field in the 61st minute of Saturday night's 34-10 win over Wests Tigers in Campbelltown.

He will have scans on Monday to assess the scale of any damage.

Centre Cobbo (shoulder) and Brisbane's regular five-eighth Mam (finger) missed the Tigers clash.

The pair will train on Tuesday when their injuries will be assessed ahead of Friday night's showdown with the Roosters at Lang Park.