Preston boss Alan Irvine wants at least two more signings before the transfer window closes on Thursday night.
And Preston North End officials have revealed one of those could yet by USA star Taylor Twellman.
North End have still not totally given up on landing the New England Revolution striker despite having a $2.5m bid thrown out by Major League Soccer.
Twellman himself is desperate to sign for the Championship strugglers and discussions are reported to be still going on to secure an 11th-hour deal.
Preston, who said last week the deal was 'dead and buried', have now set Tuesday as the cut-off point for agreement to give Twellman enough time to fly over from Boston and complete the formalities, including a medical.
North End are also said to have made an approach to Wigan to get keeper Carlo Nash back at Deepdale on loan.
Irvine has declined to say who he is targeting, although he admits he has 'irons in fires'.
"We have got until midnight on Thursday and, the way things have been going, I'm fully expecting to be sitting here at Deepdale at 11.55pm," he said. "No doubt it will go right to the wire.
"Obviously I am hoping it doesn't go that long.
"But we will keep going for as long as we have to.
"There are a few irons in fires, but everything is looking fairly complicated at this stage.
"We have been close to doing a couple of things, but for one reason or another they haven't quite come to fruition.
"We still have a couple of things that could happen and we are hoping they will soon."
Irvine has revealed he has rejected enquiries from other clubs for members of his squad and does not envisage any movement out of the club before the deadline.
"There is nothing on the outgoing front," he said.
"I have had phone calls about certain players, but I have been able to say to people I don't want to sell them.
"I am not saying there is no one who would be for sale. But I am not looking to change that side of it.
"We need to get players in, not out. I would certainly like to get another two in if I could."
Twellman, who started for the USA in a 2-0 friendly win over Sweden last weekend, has kicked off in the States after Preston's offer was rejected by MLS chiefs who hold his contract.
He has already seen Revolution team-mates Andy Dorman and Pat Noonan leave for Europe.
Dorman has joined Scottish Premier Division side St Mirren and Noonan is heading for Norwegian club Aalesund FC.
Twellman is said to be blazing that he is being prevented from doing likewise.