The future of Lee Camp remains uncertain, the veteran is out of contract next month – and David Stockdale has left the club.
This leaves only Connal Trueman and several younger options, including England Under 19 Zach Jeacock, as planned for the next term.
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This is why they are looking to bring in fresh blood – and have landed on the Swiss-born goalkeeper Dieng.
The goalkeeper played for Red Star Zurich and the Grasshoppers in his native country before joining QPR in 2016. He also represented Senegal.
Since then he has been on loan to Stevenage, Dundee and this season to Doncaster in League One.
He did so well at Rovers, that head coach Darren Moore would like to see him come back with other loan players – but admits it could be difficult.
“There’s always a chance for them to come back if it’s good,” said Moore.
“But because of their improvement here, maybe their clubs will want to try them on a different level.
“They may have caught up to this footage and this ground where they compete at the level when they return to their clubs.
“The clubs might think they are getting closer to the first level of the team and would like them to go to the championship clubs to bring them even closer.
“We will wait and see.
“We can say that we would like to find them. In 12 months, they will be bigger and stronger, fitter, better and more informed with more experience. ”
The blues could prevent Doncaster from having this chance.
Dieng has a year to complete his contract with QPR and Mark Warburton’s team may be willing to listen to the offers.