CARDIFF, WALES - MARCH 30: Anthony Joshua (L) and Joseph Parker (R) weigh-in at the Motorpoint Arena on March 30, 2018 in Cardiff, Wales. Anthony Joshua will fight Joseph Parker in a heavyweight unification match at the Principality Stadium in Cardiff on March 31. (Photo by Matthew Horwood/Getty Images)
CARDIFF, WALES - MARCH 30: Anthony Joshua (L) and Joseph Parker (R) weigh-in at the Motorpoint Arena on March 30, 2018 in Cardiff, Wales. Anthony Joshua will fight Joseph Parker in a heavyweight unification match at the Principality Stadium in Cardiff on March 31. (Photo by Matthew Horwood/Getty Images)
CARDIFF, WALES - MARCH 30: Anthony Joshua poses for the cameras during the weigh-in at the Motorpoint Arena on March 30, 2018 in Cardiff, Wales. Anthony Joshua will fight Joseph Parker in a heavyweight unification match at the Principality Stadium in Cardiff on March 31. (Photo by Matthew Horwood/Getty Images)
CARDIFF, WALES - MARCH 30: Anthony Joshua (L) and Joseph Parker (R) at the weigh-in at the Motorpoint Arena on March 30, 2018 in Cardiff, Wales. Anthony Joshua will fight Joseph Parker in a heavyweight unification match at the Principality Stadium in Cardiff on March 31. (Photo by Matthew Horwood/Getty Images)
CARDIFF, WALES - MARCH 30: Anthony Joshua (L) and Joseph Parker (R) weigh-in at the Motorpoint Arena on March 30, 2018 in Cardiff, Wales. Anthony Joshua will fight Joseph Parker in a heavyweight unification match at the Principality Stadium in Cardiff on March 31. (Photo by Matthew Horwood/Getty Images)
CARDIFF, WALES - MARCH 30: Anthony Joshua during the weigh-in at the Motorpoint Arena on March 30, 2018 in Cardiff, Wales. Anthony Joshua will fight Joseph Parker in a heavyweight unification match at the Principality Stadium in Cardiff on March 31. (Photo by Matthew Horwood/Getty Images)
CARDIFF, WALES - MARCH 30: A traditional Haka dance is performed ahead of Joseph Parker's entrance during the weigh-in at the Motorpoint Arena on March 30, 2018 in Cardiff, Wales. Anthony Joshua will fight Joseph Parker in a heavyweight unification match at the Principality Stadium in Cardiff on March 31. (Photo by Matthew Horwood/Getty Images)
CARDIFF, WALES - MARCH 30: A traditional Haka dance is performed ahead of Joseph Parker's entrance during the weigh-in at the Motorpoint Arena on March 30, 2018 in Cardiff, Wales. Anthony Joshua will fight Joseph Parker in a heavyweight unification match at the Principality Stadium in Cardiff on March 31. (Photo by Matthew Horwood/Getty Images)
CARDIFF, WALES - MARCH 30: Anthony Joshua (L) and Joseph Parker (R) weigh-in at the Motorpoint Arena on March 30, 2018 in Cardiff, Wales. Anthony Joshua will fight Joseph Parker in a heavyweight unification match at the Principality Stadium in Cardiff on March 31. (Photo by Matthew Horwood/Getty Images)