David Mackay will be forced to miss the Crows' important clash on Friday night against the reigning premiers due to a rib injury. Fortunately for the Crows however, Tom Lynch will look to make his return to the side this week.

The Crows will be without Mackay for four weeks as he recovers from rib cartilage damage he sustained in the team's last outing against West Coast.

Lynch however, is making all the right steps to coming back into the team after suffering a concussion in training last Wednesday. Experienced midfielder Sam Gibson also looks to make his return from his hamstring injury.

Riley Knight, who also suffered a hamstring injury will look to make his return to the SANFL if he can be cleared in time.

The bad news continues however as midfielder Cam Ellis-Yolmen will miss another week with a quad injury, while Andy Otten will miss two more weeks with Achilles soreness.

Mackay was set to play his 200th game next weekend as the Crows take on Geelong, unfortunately will now have to postpone the celebration by at least four weeks.

He's got rib cartilage damage, so that looks to be about a month depending on how he progresses with training and treatment," Crows general manager of high performance Matt Hass told afc.com.au.