Collingwood will wait for scans to confirm whether forward Alex Fasolo suffered a syndesmosis injury in his first game for the season.
After being forced from the ground in the second quarter of the win against St Kilda he sat out the rest of the game with the Magpies fearing he might spend significant time on the sidelines.
"He's upset," Buckley said.
"These days [syndesmosis injuries] can really linger and hang around. We will know more about it when we get the scans."
Fasolo had shoulder surgery in the off-season and spent the past five games in the VFL as he fought to win a spot back in the line-up.
He was selected for the match against St Kilda with the Magpies hoping he could provide some much needed goal-scoring power but he was only able to win two disposals before injury struck.
"Clearly getting his opportunity and then getting injured early in the game he is a bit dirty and has got plenty of emotions going on but we will get around him," Buckley said.
"It's pretty early in the year so we will give it plenty of time."
The win softened the blow for the Magpies but it was the third game in succession where they have lost a player for most of the second half with Darcy Moore sidelined last week and Scott Pendlebury the week before.
The Saints have their own injury worries with Nathan Brown suffering a suspected medial ligament strain.
The key defender hurt himself in a marking contest late in the game and coach Alan Richardson said Brown will have a scan on his knee this week.
"He's tweaked his medial ligament. To what extent, we're not sure. He'll get scans so it is likely he will miss a little bit [of football]," Richardson said.
"He thought that in the past he has been able to get back after a couple of weeks. He is a real pro. He will give himself every chance so we will just have to wait and see."
Peter Ryan joined The Age in 2017 having covered AFL as a senior reporter with AFL Media.
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