The tall central defender is excited at joining the Gunners and believes his experience of playing 76 times for Germany will help him settle quickly at his new club
The German joined the Gunners from Werder Bremen on transfer deadline day and is set to make his debut on Saturday against Swansea City.
Arsenal have had a difficult start to the season, but the tall defender still believes that they are one of the biggest names in European football.
“It’s exciting to be here but I have a lot of experience in football so that is OK for me. I am very happy and I am very glad to be here,” he told the club’s official website.
“Arsenal is one of the top teams in Europe and I have been looking out for Arsenal since I got my first jersey when I was ten or 12. Arsenal has always been special for me.”
The 26-year-old has already amassed 76 caps for his country, most recently in the midweek 2-2 against Poland.
He made his debut in 2004 under Jurgen Klinsmann and since then has played in the last two World Cups.
It is this experience, the defender believes, which will help adapt to playing in England after spending his entire career in his homeland.
“It is a little bit easier if you have played a World Cup for Germany and I hope I can use my experiences in my career,” he added.
“We met England and that is a great experience I have. But I also have to improve myself and that should be my first thought."