Sergey Kovalev pled guilty Friday in a criminal case stemming from an alleged violent incident with a woman and dog in 2018 ... and the boxing star will now have to spend the next 3 years on probation, TMZ Sports has learned.
Kovalev was accused of punching a woman in Big Bear, Calif. back in June '18 ... after the alleged victim claimed she turned down his sexual advances.
The woman, Jamie Frontz, said the two had met at a boxing gym-opening party ... and began kissing at her rental cabin shortly after.
But, she says when she pulled away from the fighter after feeling like he was too aggressive ... he became violent.
Frontz says Kovalev kicked her dog ... and then later socked her in the face.
In an interview with TMZ Sports about the incident, Frontz claimed the punch caused a broken nose, a concussion and facial lacerations.
Kovalev was eventually arrested and hit with a felony assault charge ... and faced YEARS behind bars.
But, according to court docs, Kovalev cut a deal with prosecutors Friday ... and got the felony charge dropped.
In exchange, 37-year-old Sergey pled guilty to misdemeanor fighting/noise/offensive words ... and was sentenced to 3 years probation.
Kovalev was also ordered to serve a 2-day jail sentence ... but he received credit for time served and won't spend any more time behind bars.
Court docs also show Kovalev must attend/complete an anger management program, as well as pay $220 in court fees.
We've reached out to the boxer's attorney for comment ... but, so far, no word back yet.
Frontz's civil case against Kovalev, meanwhile, appears to be ongoing. She sued the former champ seeking the $650,000 she claims he agreed to pay her in the wake of the incident.