A former professional boxer is a prime suspect in the bludgeoning murder of her husband, whose body was found inside their apartment in Switzerland.

Brazil-born bruiser Viviane Obenauf, 34, is suspected of clobbering her hubby “with a blunt object” inside the home they shared, the UK’s Daily Star reported.

She was arrested last week after the victim, identified only as 61-year-old Thomas, was found dead of “massive injuries” sustained during a “violent assault,” Swiss police said.

Obenauf — who fought in three world title bouts during her career — held a 14-6 record and two World Boxing Federation international titles before she retired last year.

She got married on Jan. 25 and opened a gym in the Swiss town of Interlaken, where she lived with her husband, the owner of a restaurant there, according to local newspaper Blick.

Police were spotted searching the gym, as well as the couple’s apartment, located above Thomas’ eatery, Des Alpes.

The former featherweight has been arrested at least once before — for allegedly punching a man who tried to grope her as she celebrated her 30th birthday in London in 2016, the local report said.

She spent several hours in jail on the night of that incident.

A man who said he’d previously dated the fighter told Blick he wasn’t surprised his ex was back behind bars.

“She always had two faces. It’s like flicking a switch,” he said.