Sunderland manager Martin O'Neill has been told to match Wolves' £15 million valuation of Steven Fletcher - or stop unsettling the former Scotland striker.
Fletcher, 25, handed in a transfer request last week after Wolves rejected an offer of £12 million from Sunderland and has since been unable to train and play, after tweeting with the hash tag "headsgone".
On Tuesday, Wolves rejected a second bid from the North East club, believed to be £13 million, as manager Staale Solbakken attempts to halt the uncertainty creating disharmony within the club's dressing room.
The Norwegian coach has already admitted Matt Jarvis may be suffering from stress because Wolves have rejected a £9 million offer from West Ham for the England winger.
Solbakken has also claimed it is "stupid" to continue believing everything is "fine" at Molineux with all the turbulence behind the scenes.
Only recently, former captain Karl Henry claimed all the speculation around the futures of Fletcher and Jarvis was "doing his head in" and creating problems in the dressing room.
While Solbakken believes that is a convenient excuse for any player to use at a club which ended its three-year stay in the Premier League, there comes a point when the unsettling really is an issue.
Wolves appear to have reached that point judging by the reaction of chief executive Jez Moxey, who for so long denied official bids from West Ham, Sunderland and Fulham for the club's top players.
Solbakken expects Fletcher and Jarvis to play for him in the Championship if their transfers are not finalised swiftly and Moxey has effectively warned Sunderland to put up, or shut up, ahead of the weekend launch of the new season.
"All parties need to draw a line under this matter, which has now dragged on for over a month," said Moxey. "We need to focus on the season ahead and these disruptions to the squad's preparations are unhelpful.
"We have always said we want to keep our best players. If our valuations of them are not met then they will remain at Wolves. But we cannot allow this speculation about their futures to drag on indefinitely up to the closure of the transfer window."