Unbeaten Davis lived up to his knockout-artist reputation with his 20th win inside the distance out of his 21 victories.
The 35-year-old Kovalev won by a 12-round unanimous decision to avenge a stunning loss to Alvarez six months ago and retake the World Boxing Organization 175-pound belt.
The 24-year-old Xu went on the offensive landing solid combinations and forcing Rojas to go into a defensive shell for several rounds.
The AIBA is being investigated by the International Olympic Committee which in November froze preparations for boxing at next year's Games, warning it could be stripped of the right to run the competition.
The New York Daily News had reported that some in the Filipino legend's camp feared he had suffered a potentially career-threatening detached retina.
Pacquiao was set to fly home to the Philippines on Monday for an exam by an eye specialist, according to the newspaper, which cited two unnamed sources from Pacquiao's camp with different takes on the injury.
The Filipino star is now hoping to avenge his 2015 loss to Mayweather which became the richest one-day sporting event in history.
American Plant knocked Uzcategui down twice as he dominated the early rounds then faded over the last few but managed to hold on for the crown at the Microsoft Theater in Los Angeles.
Kom capped her 2018 campaign with her sixth world championship title after defeating Ukraine's Hanna Okhota by 5-0 in Delhi.
Mayweather floored Nasukawa, a kickboxer less than half his age, three times in the first round of the three-round contest before the Japanese fighter's trainer rushed in to stop the fight.
The 41-year-old unbeaten champion has been tempted out of retirement -- again -- for a one-off "exhibition" in Saitama, north of Tokyo, against "Ninja Boy" Nasukawa, a fighter more than half his age at 20.
Warrington won a unanimous decision by two scores of 116-112 and one of 116-113 in the first defence of his world title as he extended his unbeaten professional record to 27-0.
Stevenson has not improved since doctors sedated him and put him on a medical ventilator to breathe after his 11th-round knockout loss to Ukraine's Oleksandr Gvozdyk on December 1 in Quebec City.
A car, pickup trucks and appliances were raffled off and President Rodrigo Duterte and celebrities were among the well-wishers at the all-night event, held at a sprawling shopping mall in his home city of General Santos.
The New Year's Eve bout, first announced in early November, was abruptly scrapped by the unbeaten 41-year-old American after a "misunderstanding" over the fight's terms, according to mixed martial arts promoter RIZIN.