Former Manchester United defender has played against Gareth Bale.
Rio Ferdinand says if Gareth Bale does leave Real Madrid then it should be to join Manchester United.
The former United defender has played against Bale in the Premier League, although admits for now he does not believe the Wales international will depart the Santiago Bernabeu.
Bale featured against United in the UEFA Super Cup last week.
Bale was in action for Real Madrid last night in the first leg of the Spanish Super Cup, but was overshadowed by his teammates.
Cristiano Ronaldo stole the show at Real won 3-1, while Marco Asensio scored an impressive goal to put the game beyond doubt.
Manchester United boss Jose Mourinho last week admitted his admiration of Wales star Bale, who played in the Premier League previously for Tottenham.
Real Madrid have yet to give any indication they plan to let Bale leave, nor is he unhappy in Spain.
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