Cardiff City defender Mark Hudson has admitted that he is concerned that the club could lose several key players following their relegation from the Premier League.

Hudson said that the likes of Gary Medel, Steven Caulker and Fraizer Campbell have release clauses in their contracts, which could see them secure top-flight moves this summer.

"Obviously it's well written that they've got release clauses in their contracts and they are players that are highly sought-after," he told Wales Online.

"Gary has started well in the World Cup. If he goes on and has a really good World Cup, I can't see why there wouldn't be teams wanting him.

"[Caulker is] a young British centre-half who's only going to get better and a leader in his own right, so there's going to be teams after him."

Hudson has played for Cardiff since 2009.