Amir Khan is confident that his mooted clash with pound-for-pound king Floyd Mayweather will be confirmed in "the next couple of weeks".
Rumours of a bout between Mayweather and the former WBA and IBF light-welterweight champion have been circulating recently, but no official announcement has been made.
However, the 27-year-old from Bolton believes a deal, which would likely see him face the unbeaten American in Las Vegas in May, is close to being agreed.
Khan said: "It's the fight I've always been after and we're very close now, not too far away. Hopefully something is going to be announced within the next couple of weeks."
Khan will not have fought for 13 months by the time a projected fight with Mayweather takes place, having pulled out of a deal to fight the then IBF welterweight champion Devon Alexander in order to pursue his dream bout.
Khan believes the time out has helped turn him into a better fighter as he has worked with trainer Virgil Hunter on correcting mistakes which were all too evident in his scare against Julio Diaz last time out.
"The break has been so good for me because over the last few years I've been training or fighting all the time and this time I've focused on building my relationship with Virgil," he said.
"Next time I go into camp I'm going to know exactly what I'm doing with him. I've already been working on correcting the mistakes I've made in the past, so you're only going to see an improvement."
Khan would start out as an huge underdog against Mayweather, who stretched his record to 45-0 when he outpointed Mexican Saul Alvarez in September.
However, Khan said he will take heart from recent upsets in the sport, including Alexander's loss to Shawn Porter, and Adrien Broner's defeat to former Khan foe Marcos Maidana last weekend.
Khan added: "Boxing's all over the place at the moment with all the underdogs coming through to win. Porter was the underdog against Alexander then Broner was beaten and knocked down by Maidana.
"It's the time of the underdogs. If I get the fight against Mayweather I have no doubt I can go and take it."