Collingwood star Taylor Adams has suffered a hamstring injury, as first reported by SEN's Sam Edmund.
Collingwood confirmed Adams suffered a strained hamstring in a statement on Tuesday morning, but that he is aiming to play Round 1.
"Collingwood vice-captain Taylor Adams strained his hamstring at training on Monday," the statement reads.
"Given the 27-year-old's history the medical department will monitor his progress over the coming weeks.
"Adams will continue to work towards a round one appearance against the Western Bulldogs on 19 March."
It is a major blow for the Pies just a month out from the season, with the gun midfielder coming off a career-best campaign.
Adams averaged 22.6 disposals, 5.4 tackles and 5.2 clearances in all 19 games for the Magpies in 2020, claiming his maiden All Australian blazer and best and fairest.
It adds to Collingwood's pre-season injury list - with Jordan De Goey missing a week of training due to an abdomen issue and young pair Will Kelly and Reef McInnes sustaining calf and finger injuries respectively.
Collingwood face Richmond in their sole pre-season clash on Friday March 5 and then open the season proper against the Western Bulldogs on Friday March 19.