El-Hadji Diouf has completed his move to Blackburn from Sunderland, for a fee of £2million.
After spending three years together at Bolton, Blackburn boss Sam Allardyce and Diouf are again reunited at Ewood Park.
Allardyce said: "He is a talented player. He can be a little wayward, as everybody knows, but hopefully I'll be able to control him as much as I did when I was at Bolton."
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