Crystal Palace boss Sam Allardyce is unsure if they're good enough to stay up.
Palace currently sit just one point from the bottom of the Premier League.
"We have just got to get better, individually and collectively, and if there's any more to bring in we'll try our best to do it," Allardyce said.
"I certainly think when Wilfried (Zaha) and Bakary Sako come back it will make a difference, and keeping (James) McArthur fit and Loic Remy fit too.
"The whole job's very difficult at the minute but eventually by the time the window shuts it'll be us working with them tirelessly to make them better at getting results. The task is first and foremost to stop letting goals in."