'It's not a hobby. It's my career': Claressa Shields out to make more history

Team USA boxing coach Billy Walsh with Claressa Shields of USA following their Women's Boxing Middleweight Final bout with Nouchka Fontijn in 2016. Picture: Stephen McCarthy/Sportsfile

Double Olympic champion Claressa Shields has compared herself to Muhammad Ali and, as the American fighter claims another record, has laid claim to being the greatest female boxer of all time.

Shields is headlining an all-female card in her hometown of Flint, Michigan, on Friday as she looks to win an undisputed title in a second weight division when she takes on Marie-Eve Dicaire of Canada with all the super-welterweight belts on the line.