Arsenal are keen to take Jerome Boateng on-loan from Bayern Munich.
The Sun says Mikel Arteta knows he needs to strengthen his defence, which has kept just four clean sheets in the league this season.
Boateng, 31, is reportedly keen to move on after starting just nine league games this season.
The central defender did start in Bayern's 4-0 win over Hertha Berlin on Sunday.
Arteta knows the defence needs improving, with a goal difference of minus two.
The Spaniard is also planning on bringing RB Leipzig centre-back Dayot Upamecano in on a permanent deal.