Kell Brook has retired from boxing at the age of 36, a little under three months since beating long-time domestic rival Amir Khan.
Former IBF welterweight world champion Brook stopped Khan with a sixth-round stoppage in Manchester back in February.
Another domestic dust-up with Chris Eubank Jr had been a possibility, while Conor Benn had also been suggested as an opponent.
But Brook will instead hang up his gloves with a professional record of 40-3.
Speaking to the Sunday Telegraph, he said: "I've had a long chat with my family and my parents, and it's over for me. I'll never box again.
"It's a little emotional to be actually saying this out loud. My mum is relieved. I think everyone around me is pleased.
"Truth is, boxing is a very, very tough, dangerous sport, one in which you can be legally killed in the ring, and I've finished now with all my faculties intact."
Brook's three career defeats came against notable names in the form of Gennady Golovkin, Errol Spence Jr and Terence Crawford.
He became a world champion in August 2014 by defeating Shawn Porter in California but, despite continued calls, did not face off against Khan until nearly eight years later.
It was getting the win on the record against Khan that convinced Brook now is the right to step away from the ring.
"I needed the Khan fight, I needed to settle the grudge, the feud," he said. "There is no dark feeling left in me now, I think when you have been in the ring with someone it passes, it leaves you.
"Me and Amir said some words which were hateful in the build-up, but that's what happens in boxing. But I respect him after the fight. He showed real heart in there."
