Khan is unbeaten in 17 fights since joining the pro ranks
Amir Khan has announced that he will be trained by Frank Warren's matchmaker Dean Powell for his next bout after splitting with coach Oliver Harrison.
Harrison trained Khan for his first 17 professional fights, with the split blamed on a breakdown in communication.
"We're going to start working next week with the new coach Dean Powell," 21-year-old Khan told BBC Sport.
"He's been in the corner with me since the first fight so he knows what I'm capable of and knows what I'm like."
The partnership is only temporary, up until Khan's next fight at the National Indoor Arena in Birmingham on 21 June.
A decision on a permanent successor to Harrison will be made after that bout.
That could yet be Powell, who is part of Khan's coaching team, but the Commonwealth and WBO intercontinental lightweight champion does not want to be rushed into making a decision.
I always said I wanted to be world champion at 21 so that's my ambition, that's my goal and that's what I'm working towards.
"We're just going to go into the gym and work together, get used to each other, and take it from there," he added.
Powell has trained former world champions Duke McKenzie and Lloyd Honeyghan and has also worked in the corner with Joe Calzaghe, Nigel Benn and Khan.
An American coach is also a possibility after the Olympic silver medallist spent a short time working in the gym with Roger Mayweather, uncle and trainer of Floyd Mayweather, during his recent trip to Las Vegas for the Calzaghe-Bernard Hopkins fight.
That experience has left the Bolton fighter wanting more and he admits he is eager to make his name across the Atlantic.
"Seeing it in America - the crowd, the atmosphere, the advertisements and how big boxing is over there - it's made me want to go over there and fight," he said.
"I've got a style that the Americans will love and I'm so ambitious. I want to go over there and win world titles; that's the kind of people they want to see.
"I want to fight in America. I want to fight all over the world for world titles."
A world title fight might not to be too far round the corner and Khan is keen to become a world champion before the year is out.
"If it was up to me I would fight for a world title tomorrow.
"But there are so many things you have to work out. There are two new world champions and they have to fight each other before I can have a shot at one of them.
"We'll just have to see how it goes, but there's no doubt about it - this year has been my year.
"I want to become a world champion this year, I always said I wanted to be world champion at 21 so that's my ambition, that's my goal and that's what I'm working towards."