WBA super middleweight champion Callum Smith will be ringside to watch the scheduled clash between Daniel Jacobs and Julio Cesar Chavez Jr., according to Sky Sports.
Jacobs vs. Chavez Jr. takes place on Saturday night in Phoenix, Arizona.
Smith will be there for two reasons - to scout the main event, and to support his older brother, former world champion Liam Smith, who faces Roberto Garcia on the undercard.
For Jacobs, the contest will be his official debut at super middleweight, after losing a twelve round decision to Canelo Alvarez in a middleweight unification back in May.
Both Jacobs and Smith are promoted by Eddie Hearn of Matchroom - making the contest a much easier fight to make.
For Chavez Jr., it's only his second fight since losing a twelve round decision to Canelo in May of 2017, in what was a catch-weight bout contested at 164.5-pounds. Chavez Jr. had a stay busy fight in August, that only went one round, in Mexico.
According to Jacobs, he was struggling with the weight for several fights - including back in May, where he paid a fine for his inability to make a rehdyration weight on the morning of the fight.
"I feel strong," Jacobs said to Sky Sports. "My whole camp has been extremely happy.
"When I fought for the middleweight championships, for the past two years you guys don't understand the damage I was doing to my body trying to make weight.
"We looked exceptional in the gym but, those last two weeks prior to making weight, we'd leave it in the gym. Now I have an opportunity to carry over those skills, to be hydrated, to be 100 percent. The skills in the gym that my team sees? I am allowing the world an opportunity to see that. The super-middleweight division is full of great competition."