Carlton will be without forward Charlie Curnow for the next 3-4 weeks, after he sustained a medial ligament injury in his side's win over Fremantle on Sunday.

Curnow suffered the injury in the opening minutes of Sunday's game, with Director of High-Performance Andrew Russell telling the club's website Curnow should return in the timeframe.

โ€œCharlieโ€™s got a medial ligament knee injury which is what we thought on the day, the MRI confirmed that,โ€ Russell said.

โ€œWe think heโ€™ll miss three or four games.โ€

Blues co-captain Patrick Cripps will face a fitness test later in the week, to prove his availability for his side's clash against Melbourne on Sunday.

โ€œPatrick will be a test this week โ€” he ran today and moved quite well. Heโ€™s a chance to play and weโ€™ll see how he holds up under a bit of footy load later in the week,โ€ Russell said.

David Cunningham will also face a test, while Harry McKay will miss another week.