Skysports.com understands that Stoke have joined the race for Reading defender Matt Mills.
Wolves and Leicester have so far led the way in pursuit of the 24-year-old centre-half's signature.
Reading have confirmed they have turned down a bid from Wolves while Leicester are believed to be considering a move for Mills.
But Stoke are now thought to be lining up a bid to challenge Premier League rivals Wolves after asking the Royals about their captain.
The Championship outfit are thought to have valued Mills at £4million with Wolves having so far bid in the region of £3m.
But manager Brian McDermott insists they are not looking to cash in on their prized asset.
Mills joined Reading from Doncaster in 2009 for a fee in the region of £2m and last season he helped them reach the play-off final, where they were beaten 4-2 by Swansea.