Middlesbrough boss Gareth Southgate cannot guarantee new signings during the January market.
"I've no idea if there will be signings," said Southgate.
"I've said to the players that our attitude has to be to stay positive as a group. We can't affect things that are out of our control.
"I've kind of stopped them talking about possible new signings.
"If it did happen it would give everyone a lift but I can't put my hand on my heart and say it is going to happen - we'll just have to see who is available and who is in our price range."