Arsenal are weighing up a £10 million bid for Germany's World Cup star Per Mertesacker, as the north London club look to strengthen their backline this summer.
According to a report from The Sun, defenders remain a priority for Gunners boss Arsene Wenger this summer, with William Gallas and Mikael Silvestre leaving the Emirates.
Should Sol Campbell decide to join Celtic then the north Londoners would be left with just Thomas Vermaelen and Johan Djourou.
However, Arsenal have already reportedly agreed an £8.5m deal with FC Lorient for Laurent Koscielny and now have the Werder Bremen man in their sights.
Gunners boss Arsene Wenger has decided to go for the 6'5" German after his initial approaches for Everton defender Phil Jagielka met with a negative reaction.