Newcastle boss Rafael Benitez is unable to offer any guarantees that he will stay at the club until the end of the season.
Benitez is out of contract at the end of the campaign and has been reluctant to begin talks over an extension.
The Spaniard has grown increasingly frustrated at the club’s inability to compete in the transfer market and has frequently clashed with its hierarchy over their failure to strengthen the squad.
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The Magpies, currently 17th in the Premier League, have yet to make a signing this transfer window and saw a move for Lazio full-back Jordan Lukaku collapse on medical grounds last week.