SYDNEY, NEW SOUTH WALES - AUGUST 04: Sam McLarty of the Magpies competes for the ball against Alex Johnson of the Swans during the round 20 AFL match between the Sydney Swans and the Collingwood Magpies at Sydney Cricket Ground on August 4, 2018 in Sydney, Australia. (Photo by Matt King/AFL Media/Getty Images)

Luckless Swans defender Alex Johnson has re-injured his knee during his side’s clash with the Demons at the MCG on Sunday afternoon.

Johnson had to be helped from the ground and is in the hands of trainers to determine the severity of the injury.

Swans football boss Tom Harley confirmed to Chanel Seven’s Daisy Pearce that “it looks like an ACL.”

Johnson returned last week having not played for six years after dealing with a host of injuries, including five knee reconstructions.