Chuck Liddell has filed for divorce from his wife of 10 years ... just days after the UFC legend was arrested for domestic violence in Los Angeles, TMZ Sports has learned.
51-year-old Liddell filed for "dissolution w/ minor children" from his wife Heidi on Friday at a courthouse in L.A.
We broke the story ... Chuck was arrested early Monday morning at his Hidden Hills home after police responded to a call for a domestic disturbance.
When cops arrived, they spoke to Chuck and Heidi ... and determined a verbal argument turned physical.
While Chuck was taken to jail ... he's adamant he was actually the victim, and volunteered to go with cops so Heidi could remain at their home with a minor child who was in the house.
"I was the victim of the incident last night at our family home, as details of the case will reveal," Liddell said in a statement the day after the arrest.
"The deputies informed me that my wife would be arrested, as I did not respond to her assault while I sustained bruising and lacerations. I volunteered to go in her place."
Heidi was cited on the scene, but not taken into custody.
Chuck and Heidi have been together for over a decade ... engaging in November 2010. They have two children together.