Tony Bellew says he is considering retirement in the wake of the most high-profile win of his career against David Haye.
Bellew shocked Haye with an 11th-round stoppage win in their heavyweight clash at London's O2 Arena on Saturday.
Promoter Eddie Hearn says American Deontay Wilder, the WBC world heavyweight champion, and New Zealand's Joseph Parker, the WBO world heavyweight king, are realistic fights for the Bellew.
However, Bellew told BBC Radio 5 live: "I will be totally honest, it's [retirement] an option.
"I'm thinking about it. I don't know how many times I can put my body through this and how many times I can put my family through this. I'm going to take time to think about it.
"I've got a lot of options. I'm the best heavyweight outside the world champions and let's not forget that. We've got three world champions -- Anthony Joshua, Deontay Wilder and Joseph Parker -- and none of them have a name like David Haye on their records.
"Anthony Joshua is a friend of mine and I've got a lot of time for him ... I would never put his name out there. The fat boy is enjoying being heavyweight."
Hearn insists he would be happy if Bellew, who was crowned WBC cruiserweight champion at the home of his beloved Everton Football Club last May, never fought again.
"Tony Bellew is probably my closest friend in the sport and if he phoned me up today and said I'm done, I would be extremely happy with what he has achieved in the sport and with us," Hearn said.
"He has challenged for two world titles with us [Matchroom Boxing] and won one world title and on Saturday he secured the future for him and his family, and that's what he fights for."
Neither Haye nor Bellew will be boxing any time soon due to injuries.
Bellew broke his hand in the second or third round, while former WBA heavyweight champion Haye needed surgery on Sunday after rupturing his Achilles in his right leg in the sixth round.
Bellew, who had an acting role in the 2015 Rocky film Creed, says he dislikes the fame his success brought him and is happy to have secured his family's future after earning 40 percent of a £7 million purse from fighting Haye.
Speaking about sending his wife and three sons away to Dubai ahead of the Haye fight, Bellew added: "I didn't want them around for the madness of fight week.
"My eldest boy is 11 and I didn't want him going to school and hearing comments saying his dad is going to get hurt. Thankfully his dad came home safe and he's going to school with a smile on his face and it might be the last time his dad does this.
"I'm looking forward to spending some down time with my family."