The confident 24-year-old super middleweight from Edinburgh has used the formative stages of his career to lay the foundations he hopes will support him for years to come.

Arthur (5-0, 1 KO) has logged nearly all his training since turning professional. Every strength-and-conditioning session, every meal, every round of sparring.

On November 7, Arthur will box professionally for the sixth time, fighting on the undercard of the vacant WBC light heavyweight title fight between Joshua Buatsi and Willy Hutchinson at Manchester’s AO Arena.

“I've got my journals from my pro debut right up until today, actually,” he told The Ring.

“I just finished a strength and conditioning session, and obviously I've wrote down how I felt, how fueled I felt, how tired I was and given myself a wee rating, one through 10. It's important to know all these little things, especially when I'm the one going to have to fight your Buatsis or Hutchinsons one day. It's good to know what's worked for you and what hasn't.

“I think I said in one of my journals as well that no two days are the same. No camp is the same, but I think the pillars and the foundations that you lay early on somehow maintain. They stay there.”

It is common to ask any young prospect whether life as a professional has been everything they expected it to be when they were hitting the bag and looking at old fight posters in their amateur gym.

So far, things have gone exactly as Arthur must have imagined them. 

His father, Alex Sr., had a long relationship with Frank Warren, and a video shows the former WBO junior lightweight champion joking with the Hall of Fame promoter that if his son ever decided to fight, he would let Warren look after him. By his side in the near-20-year-old video is Alex Jr. 

Since turning professional in May 2025, Arthur has become a staple of Queensberry’s major arena shows in Scotland, supplemented by regular appearances on Scottish small-hall shows. 

“I've took it like a duck to water,” he said.

”If I was to compare what I would maybe be doing to what I'm actually doing with my life, this is by far what I'm supposed to be doing. There's nothing that I would be better at than what I do.

“I think saying being a natural is maybe a little too far in most people's cases, but I am genuinely just a pure natural. It's been quite easy, to be honest with you. Apart from the training and the diet, everything else has been pretty smooth sailing.”