Former IBF welterweight champion Kell Brook (37-2, 26 KOs) is looking for bigger things when he returns for his second fight at 154-pounds.
Brook made his junior middleweight debut last Saturday night in Sheffield, and he knocked out ranked contender Sergey Rabchenko in two easy rounds.
The contest was Brook's first win in almost two years. He was coming off back to back knockout defeats at the hands of Genandy Golovkin and Errol Spence.
Brook says his overall goal is to become a two-division world champion - and he's targeting all of the titleholders in the weight class - including WBA/IBO champion Erislandy Lara, IBF champion Jarrett Hurd, WBC champion Jermell Charlo and WBO champion Sadam Ali.
All four of the champions are scheduled for action in the next few months.
Lara and Hurd will unify next month. Charlo is set to make a voluntary defense on June 9th, and Ali will likely face Liam Smith on May 12.
"I want to become a two-time world champion. The mojo is back - I'm loving the gym, I'm loving the game again. I've put all the world champions on notice," Brook told Sky Sports.
And the biggest fight out there for Brook, at least financially, is a showdown with domestic rival Amir Khan.
Khan will return for the first time since May of 2016, when he faces Phil Lo Greco on April 21 in Liverpool.
Brook plans to be ringside and hopes to face Khan at some point in 2018. They are currently a weight division apart, but Brook believes it could very well happen at 154.
"I will be ringside and something could happen there," Brook said. "I passed the acid test in my fight, now he's got his fight.
"There's nothing stopping our fight from happening. The ball is in his court. He hasn't boxed for two years, he isn't a spring chicken. He's struggling to do the weight [at 147]. He might do 154lbs like me. We can talk about a catchweight."