Newcastle United manager Alan Pardew is worried that his team's good performances in the Premier League could make it difficult to keep his important players at the club.
The Toon boss is trying to arrange new deals for those whose contracts are running out, but there has not been much progress as yet.
Pardew is concerned about Fabricio Coloccini and Danny Simpson's expiring deals because he believes that several clubs could be looking into signing them next month or when their contracts finish in the summer.
"As a manager I want my captain to be secured, they all seem to rumble on at this football club," Pardew told The Northern Echo. "Hopefully we can strike a deal with the three we're talking to.
"I'd like to keep all the players here because they are doing terrific, but with success comes high expectations from the players and agents and we have to cope with that."
The Magpies are undergoing an injury crisis at the moment as key defenders Coloccini and Steven Taylor are ruled out with injury.
The ex-Southampton boss admits that the injuries are a major blow after previously fielding the same back-four in every Premier League game so far this season.
"It was massive for us when Colo was declared fit at Manchester United when we thought he would miss it," he added.
"His composure, his reading of the game and his defending in general, he is a top-class player. It gives you confidence when you have him alongside you.
"We have been working as a back five in training, day in and day out, working on things. It's nice when you don't have to change things."