Lee Selby wants a unification clash with Carl Frampton "sooner rather than later" as he's eager to prove himself as the No 1 domestic fighter in the featherweight division.
The Welshman defends his IBF title against Jonathan Victor Barros on the same bill as Frampton's rematch with Leo Santa Cruz in the early hours of Sunday morning, live on Sky Sports.
WBA 'super champion' Frampton has admitted interest in a summer fight against Selby in Belfast with two world titles on the line, if they are both victorious in Las Vegas this weekend.
"I see that fight happening sooner rather than later," Selby told Sky Sports. "We are both world champions at the moment, we're both from the UK, so how can we call ourselves the best in the world, if we don't know who is the best in the country?
"I've been over to Belfast before. I defended my British and Commonwealth titles there and I would be more than happy to do it again.
"The result? I would have to go with myself winning. I don't know by what method, but I'll find a way to win."
The 29-year-old must firstly overcome mandatory challenger Barros and expects a physically demanding title defence.
"My opponent is very experienced, he's a tough, physically strong man," said Selby.
"He's a former WBA world champion, made a few successful defences, and he's the No 1 ranked challenger. It's going to be a tough fight, I expect a tough fight, but one I'm confident of winning."
Frampton battled to a thrilling points win over Santa Cruz last July and Selby hopes to take a ringside seat for the return fight.
Selby said: "Hopefully I can come out of my fight unscathed, with a victory, and rush to ringside and watch the second fight as I did the first one.
"The first fight was an excellent spectacle. It was one of the best fights I've seen live. If it's half of that fight, it's going to be a great contest.
"Before the first fight I couldn't pick a winner and at the final bell, I couldn't pick a winner either, and it's the same going into this fight."
Watch Carl Frampton's rematch against Leo Santa Cruz and Lee Selby's IBF title defence against Jonathan Victor Barros in Las Vegas, live on Sky Sports 1, from 1am on Sunday January 29.