Every now and then, we’re reminded how dangerous boxing can be. Junior middleweight Patrick Day is reportedly in a coma after receiving emergency brain surgery following a vicious 10th round knockout Saturday night.

Day, 27, was knocked out with a brutal left hook by Charles Conwell at Wintrust Arena in Chicago. The middleweight was knocked out cold in the 10th round and needed medical attention.

Day was placed on a stretcher and rushed to Northwestern Memorial Hospital in an ambulance. He suffered a seizure before he was taken to the emergency room, sources told ESPN. Day slipped into a coma at some point during his time at the hospital and placed on a breathing tube. However, reports are unclear if doctors placed him in a medically induced coma to help with any swelling on the brain.

Sergio Mora, a former light middleweight champion, posted words of encouragement for the boxer. “Everyone please send a prayer to Patrick Day & his family today,” Mora tweeted.

Mauricio Sulaiman, president of the World Boxing Council, also tweeted about Day. “My prayers are with Patrick Day and his family,” he said. “May God bless the doctors and medical staff treating him and give his family strength during these difficult moments.”

This knockout is the junior middleweight’s second consecutive loss. His current record stands at 17-4-1, with 6 KOs. His opponent, Conwell, was listed as 11-0, with eight KOs, after the fight.