Floyd Mayweather could make his sensational return fight against former super-featherweight champ Takashi Uchiyama.
According to reports, MMA promotion RIZIN are working to bring the 43-year-old back to the Far East, with ex-WBA champion Uchiyama their targeted opponent.
Mayweather hasn't fought professionally since his crossover blockbuster fight with Conor McGregor in 2017.
But the boxing legend returned to the ring in 2018 and made £7million for beating kickboxer Tenshin Nasukawa in an exhibition bout.
40-year-old Uchiyamai retired in 2016, a year before Mayweather, after losing consecutive fights to Jezreel Corrales, but was famed for his power with 20 KO's in 24 wins.
However, the 40-year-old Japanese former boxer was widely praised for his knockout power and won 20 of his 27 professional fights by KO.
Promoter Nobuyuki Sakakibara later confirmed he expects the American to again lace up the gloves - but stressed the hurdles they face to finalise a deal.
Sakakibara told Japanese press: "Mayweather vs Takashi Uchiyama is the most exciting.
"There are various problems such as immigration, opponents, money, etc.
"But communication with the person is progressing positively. I expect the possibility."
