Barnsley boss Davey battling to sign Derby's Nyatanga
"To be honest I am not too sure about Lewin at the moment. He has gone back to Derby and they have come down now so we might have to wait and see on that." he told the club's official website.
"The deal is still there with Derby but there are ways to get out of it from both sides and at the end of the day it will come down to what the player wants."
Meanwhile, Davey confirmed goalkeeper Luke Steele will be joining the club permanently on June 21 after his impressive loan spell this season.