COLLINGWOOD midfielder Levi Greenwood's season could be over after he sprained his medial ligament against North Melbourne.
The noted stopper has avoided serious injury but he will miss the next fortnight and is touch-and-go to play the last game against Melbourne.
Collingwood football manager Geoff Walsh told collingwoodfc.com.au the injury was a 2-3 week injury.
"Whether we see Levi back before season's end is problematic," Walsh said.
The 28-year-old will enter the final year of his contract with the Magpies next season.
Daniel Wells remains some chance of playing against Port Adelaide after he aggravated his quad against his former club on Saturday night, restricting his output to 60 to 70 percent.
"The major factor [deciding his availability] will be whether he is able to train later in the week," Walsh said.
The Magpies have already ruled out skipper Scott Pendlebury as well as running defenders Travis Varcoe and Ben Sinclair for the season.
They will also be without ruckman Brodie Grundy for the next two weeks after the MRP suspended him for two weeks for his tackle on Kangaroos big man Ben Brown.
Meanwhile the club is understood to have opened discussions with veteran defender Tyson Goldsack, who has had an excellent season in 2017.