(Image: Fox Footy)
Collingwood midfielder Levi Greenwood could be in trouble from the match review panel after an elbow caught Essendon star Zach Merrett in the jaw.
Greenwood stuck his elbow out and collected Merrett early in the third quarter, which floored the Bomber.
He was helped off the ground and taken down to the rooms for a concussion test.
He spent 15 minutes off the field.
Boos erupted around the ground after the replay was shown.
"The crowd have seen it off the replay, he's got an elbow to the head," Brian Taylor said on Triple M.
"This is a Levi Greenwood suspension for sure. He has got...a flying, fledgling elbow that'll net him about three to four weeks."