MELBOURNE, AUSTRALIA - MARCH 25: Sam Walsh of the Blues looks dejected after a loss during the 2021 AFL Round 02 match between the Carlton Blues and the Collingwood Magpies at the Melbourne Cricket Ground on March 25, 2021 in Melbourne, Australia. (Photo by Michael Willson/AFL Photos via Getty Images)

Hawthorn defender Kyle Hartigan will likely come under review from the MRO for an off-the-ball hit on Sam Walsh that was caught by an eagle-eyed supporter.

Footage emerged on social media last night of the incident which involved Hartigan deliberately using his elbow to make contact with Walsh's head which sent the youngster to the ground in the final stages of the game.

Walsh starred in the Blues' 23-point win with one goal, 30 disposals, six tackles and four clearances in a best-on-ground display.

Hartigan was fined $2000 earlier in the season for an incident with Geelong's Tom Hawkins.

The incident would likely have been caught by the broadcasters behind-the-goal cameras had the fan not captured the footage.

The incident is a further blow for the Hawks who suffered their fourth defeat in a row and sit second-last on the ladder.

They will aim to return to the winner's list next week when they travel to the Gold Coast on Saturday to face the Suns.