Undisputed lightweight world champion Devin Haney retained his titles by beating Vasiliy Lomachenko on points.
American Haney won by one decision – 116-112, 115-113 and 115-113 – despite landing 110 punches to Lomachenko 124 from Ukraine at the MGM Grand Garden Arena in Las Vegas.
Haney, 24, is winless in 30 fights, which includes 15 knockouts.
He became the last boxing champion when he beat Australia’s George Kambosos last year.
He is also the first fighter to hold all four belts in the lightweight division.