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The 27-year-old arrived at the north London club at the age of 16 and made 144 appearances during his time with the Gunners. The Switzerland international could play as a centre-back and as a full-back during his time with the Premier League outfit.
“Arsenal Football Club can confirm that Johan Djourou has made his move to Hamburg permanent,” a statement read on Arsenal’s official website.
“The 27-year-old centre back spent the whole of last season on loan with the Bundesliga side, featuring 24 times in the league. He also spent the second half of the 2012/13 campaign on loan in Germany, with Hannover 96.”
“A Switzerland international, Djourou helped his country to the last 16 of the World Cup in Brazil this summer. Everyone at Arsenal would like to thank Johan for his contribution to the club and wish him continued success with Hamburg,” it added.