Skoglund's last fight was a defeat by Callum Smith in Liverpool three months ago.
Boxer Erik Skoglund has been placed in a coma after suffering a bleed on the brain.
The super-middleweight was due to fight in London next weekend until the show was cancelled when David Haye pulled out of the main event against Tony Bellew.
And Skoglund's last fight was a defeat by Callum Smith in Liverpool three months ago.
A statement from his promoters read: "As previously reported, Erik Skoglund was taken to hospital yesterday having felt ill after a training session in his hometown of Nykoping.
"Erik was placed in a medically induced coma and underwent surgery last night to repair a bleed on the brain. Doctors are pleased with the results and Erik remains in a serious yet stable condition.
"The next three to four days are critical for his recovery. During this time, we ask that everyone respect the privacy of Erik and his family. We will communicate further information when it becomes available."