SHEFFIELD United manager Nigel Clough says the Blades' moves for Derby County's Kieron Freeman and Mason Bennett are in the balance.
The Blades have been trying to sign Rams full-back Freeman and bring in striker Bennett on loan.
But Clough said: "We've hit a few obstacles with Kieron.
"If we do a deal then it has to feel right for all parties concerned. We'll sit down and have a think about things over the next 24 hours to see what we can do and if we can get over them. They're not insurmountable but we can't guarantee anything.
"Being able to get Mason is part of the package so, if we can't get things resolved with Kieron then it could prove difficult to bring him here."
Bennett recently agreed a new four-year contract with the Rams.
"We want to bring Mason here because we've worked with him before and we know all about his attributes," added Clough. "He's quick, he's powerful and can be very direct but, if it proves impossible, then we'll keep on looking knowing that we've already got some very good forwards here."