Police are treating Thursday night’s assault on the 25-year-old in Wishaw as attempted murder.
They were unable to confirm reports that the victim had been hit with a machete.
The disturbance broke out in Lomond Drive in the North Lanarkshire town at around 11.20pm, during which the man was attacked.
A Police Scotland spokeswoman said: “He sustained multiple serious injuries and was taken by a member of the public to Wishaw General Hospital, where he is currently being treated. Hospital staff describe his condition as critical.”
Detectives have launched an attempted murder probe and are thought to be following a number of lines of inquiry.
Anyone with information is being asked to contact Wishaw CID via the 101 number or Crimstoppers on 0800 555 111.