Samir Nasri has revealed he is ready to open talks with Manchester City about extending his stay at the Etihad Stadium.
Blackburn have signed young defender Michael Keane on loan from Manchester United for the remainder of the season.
The Latics are believed to have seen an opening offer knocked back by the Tykes earlier in the window.
Roberto Martinez is refusing to concede defeat in his efforts to bring Stones on board, though, and has returned to the negotiating table.
Wigan hope that improved terms will tempt Barnsley into a sale.
The Championship club are reluctant to part with a product of their academy system, but appreciate that interest is steadily mounting.
Wigan are not the only side to be tracking Stones, but hope they can tie up a deal for the 18-year-old defender before a rival enters into transfer talks.