The former Gunners star would be a superb addition to the Leeds United squad.
Sunderland need new signings this summer - who could they target from the Bundesliga?
Philippe Senderos looks set to leave Ibrox this summer, less than a year after his move to Rangers.
West Ham United are said to be tracking the Swiss, who was the subject of a failed bid from Crystal Palace in January.
The former Gunner believes Arsenal are close to being title challengers.
The midfielder has completed a deal to join the Premier League side.
Johan Djourou has hailed former club Arsenal for the signing of Granit Xhaka.
The French international was released by the club this week.
Hamburg SV climbed out of the direct relegation zone on the final day of the season.
Former Arsenal defender Johan Djourou has endured a tough campaign at HSV Hamburg.