LeBron James swiftly reacted when Kyrie Irving suffered an ugly knee injury on Monday night. Irving’s former teammate Luka Doncic reacted to the news, while James chimed in soon after on social media.

Irvin was injured during the first quarter of the Dallas Mavericks’ matchup with the Sacramento Kings. His left knee appeared to buckle as he drove and gathered to shoot. He did step up and make both free throws he was awarded on the play but then had to be helped to the locker room.

From 2014 to 2017, James and Irving worked together as Cleveland Cavaliers teammates. They made three straight NBA finals appearances together, and won the 2016 NBA championship.

James has spoken highly of Irving in the years since they’ve been teammates. It’s not surprising to see him sending well wishes after an injury.