George Groves expects to fight new WBC super-middleweight champion Badou Jack in August or September.
The Londoner was in Chicago last weekend to see Jack out-point American Anthony Dirrell in an shock win for the world title.
Groves, 27, is mandatory challenger and admits he may have to travel to fight Jack, 31, in Las Vegas, where the Sweden-born fighter is based.
"I'm mandatory challenger and the rules stipulate he has to fight me within 90 days and we will try and start negotiations as soon as possible," Groves told ESPN.
"He's promoted by Floyd Mayweather who I imagine is a bit busy at this moment in time but his manager has already been in touch with my promoter [Sauerland Promotion].
"His first comment after he beat Dirrell was he wanted the fight with me so it shouldn't be difficult to put together. I want to box as soon as possible and hopefully it will be done by the end of August.
"Whether it's London or Las Vegas, where he is based, I don't mind because I'm just excited to be fighting for the belt.
"American fighters see it as a slight to have to travel, especially if they are champions, so I may have to go there.
"I've travelled before in my career so it doesn't bother me and I was expecting to have to travel if I was going to be boxing Dirrell instead.
"It would be nicer to give the people in London a chance to watch me fight in London but if it's in Vegas or somewhere else in America, no problem."
Groves admits he was left surprised by the Jack's triumph by majority decision after he was knocked out in a round a year ago by Derek Edwards.
"I had been trying to force the Dirrell fight for ages and thought they had given him a picnic fight with Jack because he had got blasted out in a round last year," Groves told ESPN.
"But it wasn't like Jack took a beating in that fight and he did really well against Dirrell. He's a good fighter and does all the basics really well. He's nice and tidy but I don't think he punches that hard and there are a few things to take advantage of."