"His phone will be red hot at this moment in time and whether Jonny will still be there in January I really don't know.
"But Jonny did brilliantly for the club, as did Danny, and it would be nice if we thought they could come back. But it's a big 'if'."
Keane added: "It was a nightmare giving them back, I have to say, because they'd settled in so well.
"But they were good professionals, hard trainers out on the pitch, half-decent with the media side and ready to put everything in."