Newcastle manager Eddie Howe said he has no money available to make a major deal this month and winger Miguel Almiron could leave the club.
Newcastle have not made a major signing since Tino Livramento arrived for £32m from Southampton in August 2023 and missed out on Marc Guehi last summer.
With the Premier League's profit and sustainability rules continuing to cause headaches for clubs, Howe says meeting the spending constraints that forced them to sell Elliott Anderson and Yankuba Menté remains a challenge.
Almiron is the latest player linked with a move to MLS this month.
Eddie Howe on Alexander Isaacs:
“We couldn't appreciate Alex enough, his contribution this season has been tremendous.” pic.twitter.com/5Qce718F0Z
– Newcastle United (@NUFC) January 17, 2025
Howe said: “No one wants to lose any player from our current squad, especially in positions where we are a bit fragile. Why would we want to leave ourselves in this situation?
“But when you're armed with all the facts, sometimes you have to endure that short-term pain.
“I don't know if this summer will be any different and all of a sudden the expectations change completely. I guess that's for another day. What I would say is that I hope the future looks completely different.”
“There's not a huge amount of money waiting to be spent, it's all about June 30 and making sure you comply with the rules by that date. Obviously if you spend money, you'll have to get it back later.
In the meantime, Howe and his players will focus solely on the task of trying to secure a club record tenth successive win when they face his former side Bournemouth on Saturday.
Doubts remain about Fabien Schar's participation due to illness, while goalkeeper Nick Pope is close to returning.