Dimi's loan at the Liberty Stadium expires on Sunday and Swansea have said that they are interested in taking the Greek keeper on loan.
"If there's a deal to be done, he can give me a call," said Chris Coleman to the CT.
"We've got Keiren Westwood who has been outstanding, Andy Marshall who has got great experience and young Danny Ireland who is coming through, so I am happy for Dimi to go out on loan.
"If Swansea want to make the deal permanent, Roberto needs to get in touch and we'll have a conversation."