"Talks have already taken place and Mayweather has agreed to fight me," Bolton-born Khan told Sky Sports News.
"But we can't look too far ahead because we've got Lamont Peterson and then I want to move up to 147[lbs] and have one fight at that weight.
"Mayweather is keen to take the fight on, it'll be a huge fight. It's a timing game. It's the time now where a young, hungry fighter comes up and takes the older, experienced guy out."
Khan will take on Peterson and defend his WBA and IBF light-welterweight titles in Washington D.C. on December 10.