A 26-year-old female amateur MMA fighter died Sunday morning just one day after collapsing in the ring following a brutal loss at an event in England.

The Hampshire Police Dept. confirmed they were called to Southampton General Hospital around 1 AM on Sunday to respond to a woman who suffered a life-threatening brain injury.

The lady, Saeideh Aletaha, had competed at the Fast & Furious Fight series event at Central Hall in Southampton, England on Saturday and reportedly collapsed in the ring.

According to local reports, an ambulance was called to the venue around 9 PM and Aletaha was rushed to the hospital in “a serious and life-threatening condition.”

Cops say Aletaha died at the hospital Sunday morning and they’re now investigating her death.

Organizers behind the F&FFS event posted a statement early Monday morning essentially saying Aletaha knew what she signed up for …

“All competitors get in [the ring] prepared that they may be injured and this is something not expected to happen 99.9% of the time.”

FFS organizers say they had a full medical team on-site — with doctors, paramedics and an ambulance — along with an “experienced team of staff with numerous first aiders.”

Exile Gym, where Aletaha trained, posted a tribute to the fighter … saying, “Saeideh Aletaha was a lovely character with a beautiful soul. Her dedication to the sport was 110% travelling miles every day just to train.”

“She found her place with us just a few months ago but has become apart of the family and will be sorely missed.”