Chelsea are keen to set up a swap deal for Brighton midfielder Moises Caicedo.
However, the Blues are insisting Levi Colwill cannot be included in the exchange, says the Daily Mail.
The Seagulls have made two offers of 30m and 40m for their former loanee in the past week. But Chelsea have refused to do business.
An exchange involving Caicedo has also been raised, but Chelsea have no interest.
Instead, they're set to draw up a list of fringe players for Brighton to choose from to help smooth negotiations for Caicedo.