Cardiff will allow long-serving Kevin McNaughton to leave this summer along with Danny Gabbidon and Nicky Maynard.
Highly-rated Atletico Madrid midfielder Saul Niguez has signed a new five-year contract.
Paris St Germain president Nasser Al-Khelaifi is set to open talks with David Beckham about extending his stay in the French capital.
The former England captain joined Carlo Ancelotti's side on a five-month deal in January, and his brief contribution has helped the capital club book a Champions League quarter-final with Barcelona as well as consolidate their position at the top of Ligue 1.
Beckham spoke of his happiness in Paris over the weekend and it now looks as though he will be given the opportunity to remain at the Parc des Princes next season.
Al-Khelaifi said in an interview with L'Equipe: "Recruiting David was one of my best decisions.
"As a man, player, ambassador, he is exceptional. It creates something in this group. Everyone loves it.
"We will talk with him. Whatever his decision, we support David.
"He is very happy in Paris. Frankly, we want to keep him with us next season."
Beckham has started once and made four substitute appearances for PSG since signing and confirmed on Saturday he is open to extending his stay.
He told Le Parisien: "We'll see. Who wouldn't want to stay at a place like this?
"It's very special but I'm not getting any younger so we'll see how I feel at the end of the season. It's always nice to be wanted."