Claressa Shields on fighting in the UK and Savannah Marshall possibility

Two Olympic gold medals, a three-weight world champion and the first boxer — male or female — to be undisputed champion in two divisions in the four-belt era — Claressa Shields is already one of the most decorated fighters in boxing history.

But the 26-year-old American does not take too kindly to the words 'self-proclaimed' being prefixed to her 'Greatest Woman of All Time' alias.

«When people say 'self-proclaimed' that's narcissistic, which I'm not,» she tells BBC Sport.

«My accomplishments, performances, skills and history-making — that's why I'm the GWOAT. Fact.»

Shields will fight in the United Kingdom for the first time as a professional when she defends her WBA, WBC, IBF and Ring magazine middleweight titles against Slovenia's Ema Kozin at Cardiff's Motorpoint Arena on Saturday night.

Shields is expecting a mixed reception in Wales, suggesting some British fight fans will appreciate her skills while others may mistake her confidence as arrogance.

«You guys like the Anthony Joshua attitude more than you like the Tyson Fury attitude,» the Michigan fighter says.

«There's nothing wrong with that but fans need to understand when there's a fighter who is in the gym and putting in the hard work, then there is nothing wrong with us to have confidence and praise ourselves for our wins.

»We have to beat ourselves up when we lose so why not uplift ourselves we win."

Shields has added trainer Gerald Tucker to her team, joining long-time coach John David Jackson, and has also been receiving tips and guidance from former pound-for-pound star Floyd Mayweather.

«My preparations have been crazy,» she says. «I went to Vegas for altitude [training] for this fight, spent some time with Floyd and added coach Tucker — who works the