Dutch internationals Patrick Kluivert, Philip Cocu, Michael Reiziger and Marc Overmars are to leave The Spanish club.
The Dutch striker has agreed a three-year contract with Spanish Primera Liga side.
The Spanish club said they had no interest in signing Manchester United centre-back Rio Ferdinand or any other member of the club's squad.
The Real Madrid striker will be out of action for up to three weeks with a muscle tear in his right thigh.
A Thierry Henry special and two trademark free kicks from Ronaldinho earned Barcelona a 3-0 win at home to Real Betis that put them within a point of leaders Real Madrid at the top of the Primera Liga on Sunday.
Striker Samuel Eto'o scored a sparkling double as Barcelona rallied from a goal down to beat Getafe in the Primera Liga.
Barcelona's grip on top spot in the Primera Liga was strengthened when Real Madrid were held goalless by Real Betis and Valencia lost 2-1 to Racing Santander.
Henrik Larsson and Samuel Eto'o scored in Barcelona's 2-0 win at Real Sociedad
With Barca enjoying a nine-point cushion at the top of the Primera Liga and only eight games left, even a draw would leave Real facing their second trophyless season in a row.
Real Madrid striker Ronaldo spurned a golden opportunity to give his side victory when he missed a last-minute penalty.
Ronaldinho and Henrik Larsson scored in a 2-0 win over Real Zaragoza and extended Barcelona's lead to nine points at the top of the Primera Liga.
Barcelona's Cameroon striker Samuel Eto'o threatened to leave the pitch during Primera Liga match at Real Zaragoza after being racially abused by the home fans.
Real Madrid ran riot to sink Espanyol 4-0 at the Bernabeu in the Spanish Primera Liga.
The Barca striker said he wants to win the Primera Liga, the Champions League, FIFA's player of the year and the Golden Ball
Barcelona were knocked out of the King's Cup after Zaragoza registered a 5-4 aggregate victory.
A round-up of weekend action in the main European leagues.
The Argentine midfielder signed a new four-year deal with Real Madrid.
Barcelona continued their irresistible form this season with a 15th straight win in all competitions after a 2-1 victory over city rivals Espanyol.
Italy striker Antonio Cassano is joining Real Madrid on a four and a half-year deal from Serie A club AS Roma.
Coach Laurent Blanc parted ways with Paris St Germain, putting pen to paper on a 22-million-euro ($25 million) severance deal.
"The most important thing is to remain calm and for all of us to stick together," Ronaldo told reporters after the game.
Leaders Barcelona set a club record of 12 consecutive wins in all competitions with a 3-1 victory at Cadiz in the Primera Liga.
Real Madrid rekindled their hopes of challenging for the Primera Liga title with a 3-2 defeat of Santander on Saturday.
A round-up of weekend action in the major European leagues.
Five-goal Valencia ended Real Madrid's short stay at the top of the Primera Liga on Sunday.
The Barca striker said he will decide whether to continue or quit once he has all the cards on the table.