The vaunted knockout artist Wilder swarmed Breazeale from the opening bell, hurting him with a straight right hand then finishing him off later in the round with the devastating right to the chin that was set up by a left jab.
One judge scored the bout 116-111 and two others saw it 115-112 for Williams, who improved to 27-1-1 with 17 knockouts.
AIBA said in a statement to AFP that it will "defend its legitimate right" to organise boxing in Tokyo and "will review all of its options, including legal, given that the IOC has breached the Olympic Charter".
Alvarez kept his World Boxing Council and World Boxing Association titles and seized Jacobs' International Boxing Federation belt in a bout that marked the Mexican's return to the middleweight division.
Alvarez starts as a heavy favorite for a contest that has been notable for an absence of trash-talking and bad blood between its protagonists.
A former WBA and WBO champion in the flyweight division, Estrada improved to 39-3 with 26 knockouts.
Golovkin is scheduled to return to action on June 8 at Madison Square Garden in New York against unbeaten Canadian Steve Rolls
The American has now won nine of his last 11 fights by stoppage.
Sadaf Khadem and her trainer Mahyar Monshipour are currently in the French city of Poitiers, the spokesperson, who asked not to be named, said.
The 31-year-old Lomachenko delivered a devastating right hook to the temple that sent the Englishman crashing face first to the canvas just 58 seconds into the fourth round.
Independent US experts of the Voluntary Anti-Doping Association were in Kiev and ready to perform tests of both candidates, Klitschko told Germany's Bild daily, offering to pay the bill.
He replaces Gafur Rahimov, a controversial Uzbek businessman who stood down last week under pressure from the International Olympic Committee.
Umar Kremlev, in a letter to the IOC, said he was "ready to close the debts of AIBA in full so long as our favourite sport remains on the Olympic programme".
Boxing's inclusion in Tokyo depends on the outcome of an investigation into AIBA by the International Olympic Committee, which has presented the body with a list of 41 questions via audit firm Deloitte.
France basked in the glow of six boxing medals in Rio, including golds for super heavyweight Tony Yoka and his now wife Estelle Mossely.