British heavyweight Tyson Fury says he may retire after his world title bout against Wladimir Klitschko this month.
The undefeated 27-year-old will fight reigning champion Klitschko for his WBA, IBF and WBO belts in Dusseldorf on 28 November.
The bout was due to take place last month but was rearranged after the Ukrainian, 39, suffered a calf injury.
"After this fight I won't have anything else to achieve and I'm on to a new part of my life," Fury told BBC Sport.
"If I've not got the motivation to carry on anymore then what would be the point?"
Fury has previously taunted Klitschko, dressing up as Batman for a press conference in September, and says motivation could be an issue for his opponent too.
"He's got tons of money, he's been successful for 11 years as a champion. What more does a man need? That's what's going to let him down on the night," he said.
"But you've got to give him credit where credit is due because to take on a young, ambitious guy like myself who's taller, bigger, faster, younger is a challenge in itself."
Fury added he would be open to a fight with fellow British heavyweight and Commonwealth champion Anthony Joshua should he decide against retirement.