Brentford boss Mark Warburton is refusing to set a deadline over Adam Forshaw's future and admits the saga could drag on beyond the end of the month.
The Bees midfielder has been training alone after being unsettled by two bids from Championship rivals Wigan Athletic, which were both rejected.
Forshaw reported back for treatment on a hamstring strain this week, but has been left in limbo as the Latics are yet to make a third offer for his services.
Warburton said: "The deadline is in place in terms of the close of the transfer window. There's a week of no activity and then the loan market opens up again. There's many possibilities.
"I saw Adam at the training ground on Monday getting some treatment. He had surgery over the summer and was getting back to fitness, but he had a slight hamstring tweak which he reported after running. That's being treated."
Wigan's bids fell significantly short of Brentford's valuation of Forshaw, who still has two years remaining on his contract at Griffin Park.
And Warburton has reiterated the former Everton youngster will not be sold unless someone stumps up enough cash.
He added: "We have a valuation on an asset. If someone wants to meet that valuation all well and good and business can be done.
"It's an ego massage when you're wanted by someone else and I fully understand that. The club have been clear any player is for sale, but it will be on our terms."