Arsenal have completed the signing of centre-back Sokratis Papastathopoulos for a £18m deal from Borussia Dortmund.

The 30-year-old, who said he was joining one of the three biggest teams in the Premier League, admitted he joins a club of big history.

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Papastathopoulos, who has emerged as the Gunners target since Unai Emery took over at the Emirates Stadium, becomes the third summer signing for North London side.

“I feel very good. It’s my first day here, everything is special,” Papastathopoulos told Arsenal’s website.

“It is a beautiful moment and I am very happy that for the next years I will be here. Arsenal are one of the three biggest teams in the Premier League.”

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“I’m a normal defender. I like to defend. I like that my team doesn’t take goals. I like a zero in the defence and I will do everything to help to achieve this goal.”

Asked why he chose the Gunners, Papastathopoulos said: “It has a lot of fans and a very big history.”

The Greece international, who joined Dortmund in 2013 from Werder Bremen, has scored 10 times in 198 appearances for the Bundesliga side.

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