This is Phiri’s second defeat in a 14-fight career that has recorded no draws. She went into the fight boasting a good away record, having won the same belt in Mexico against Yazmin Rivas last year.
The 37-year-old Juarez, nicknamed Barbie, won eight of the 10 rounds while Phiri only won two in a match held at the Arena Zócalo in Mexico City.
The Mexican’s record now stands at 58 fights with 45 wins, nine loses and four draws.
The fight was watched by renowned boxing promoter Don King who visited Catherines camp on Thursday.