Deep in the bowels of Cardiff's Principality Stadium, Anthony Joshua sat with his four world heavyweight belts in front of him and called on Deontay Wilder to get serious about negotiations for a unification fight.

Heavyweight Anthony Joshua improved to 21-0 with a unanimous-decision victory against Joseph Parker in front of 78,000 fans at Principality Stadium in Cardiff, Wales.

Deontay Wilder survived a pummeling from Luis Ortiz, then knocked out the challenger in the 10th round Saturday night to retain his WBC heavyweight title.

Adonis Stevenson will be in familiar surroundings when he makes the ninth defence of his World Boxing Council light heavyweight title. The Bell Centre, where 40-year-old Stevenson won the title with a first-round knockout of Chad Dawson in 2013, was announced Thursday as the venue for his bout May 19 against Badou Jack, a Swede based in Las Vegas.

Retired boxing champion Vinny Paz, whose comeback story after a car crash was dramatized in the 2016 film "Bleed for This," has been accused of attacking a Rhode Island man and sending him to the hospital. Providence police say they were called to a home early Tuesday morning.