WBC junior middleweight champion Jermell Charlo (30-0, 15 KOs) would have no problem stepping in the ring with Kell Brook (37-2, 26 KOs).
Snapping a two fight losing streak, and returning for the first time since May of 2016, Brook stepped in the ring on Saturday night and pulled off a stoppage victory over Sergey Rabchenko, in Sheffield.
The contest was Brook's debut in the junior middleweight division, and with the victory he picked up a WBC regional belt.
Charlo shares the same trainer, Derrick James, with Errol Spence - who last May knocked out Brook in the eleventh round to capture the IBF welterweight crown.
Brook, who is a notable name and sells a lot of tickets in the UK, is now a prime target at 154-pounds.
Brook, and his promoter, have mentioned Charlo as a potential opponent - even this year.
Charlo is scheduled to return to the ring on June 9 in Los Angeles, and is still without a dance partner - but it's unlikely that Brook will face him on the date.
"I am top tier, I am the top dog at 154lbs but I also know some of the other killers in the weight class want a piece of Kell Brook," Charlo exclusively told Sky Sports.
"I run those belts and I have defended against my mandatories twice now so me fighting Kell Brook is a decision me and my team would have to make. We would definitely try to get Kell Brook over to America, but if the money is right, the champ can always travel, go over to the UK and get the win we will deserve.
"I definitely have a blueprint. Styles make fights and I am just not the sort to say 'no problem, he's coming up into my weight class, that's it'. I know how to beat him already. I am one of the hardest-hitting light-middleweights they've had for centuries."