Jenny from the Block has clocked ex-boyfriend Sean “Diddy” Combs in a high-stakes battle to purchase a ­cable music network.

The NuvoTV network — in which Bronx-born singer Jennifer Lopez owns a minority stake — outbid her former beau in a fierce competition to buy the Fuse channel from MSG, sources told The Post.

Combs offered nearly $200 million for Fuse, but was slightly outbid by J.Lo’s operation.

Combs had been desperately trying to combine Fuse with his video channel, Revolt, to build a cable empire of his own.

“This is a real blow to Diddy and Revolt,” said ex-Fuse chief Eric Sherman, who has also worked with J.Lo on TV’s “American Idol.”

“Fuse was such a perfect fit for them. But having worked with Jennifer on ‘Idol,’ I’m not surprised she and her team prevailed.”

MSG said in September that it was working with JPMorgan Chase to find a buyer for the flailing Fuse channel.

In his quest to obtain the network, Combs was backed by billionaire investor Ron Burkle.

One person familiar with the negotiations said the Dolan family, which owns MSG, had tried to set the asking price for Fuse at about $400 million.

The precise winning bid for Fuse was not clear Thursday.

Music superstars J.Lo and Diddy dated from around 1999 to 2001.

Since their pop-music reign, they have morphed into business-savvy celebs, branding everything from clothing lines to booze.

Combs, who at times over the years has gone by the names Puff Daddy, Puffy, P.Diddy and Diddy, declared last month that he was and always will be Puff Daddy.

Lopez partnered with the English-language NuvoTV, which focuses on American Latinos, in 2012.

“I saw it as a no-brainer,” Lopez told Variety after the deal. “I’m an English-speaking Latina myself. I want to take NuvoTV to the next level.”

In addition to holding a minority stake, J.Lo, 44, advises NuvoTV on strategy and marketing.

The LA-based channel now reaches 34 million households.

The big-money purchase gives Lopez’s company distribution to 74 million homes.

The music-oriented Fuse has not been very successful under MSG despite several rebrands.

MSG, known for its sports programming, is expected to focus more on subscriptions and regional sports.

An official announcement on the acquisition is due Friday.

NuvoTV declined to comment, but Benny Medina, Lopez’s partner, has previously said the acquisition would be a “game-changer” for the company.

MSG officials declined to comment.