Arsenal have confirmed the signing of defender David Luiz from Chelsea for £8m.
The 32-year-old Brazilian defender has signed a two-year deal with the Gunners.
Unai Emery, who worked with Luiz at Paris Saint-Germain, told the club website: "David has huge experience and I look forward to working with him again. He is a well-known player and adds to our defensive strength."
Luiz spent six and a half years at Chelsea during two spells.