Arsenal have set their sights on Fenerbahce defender Simon Kjaer and Bayer Leverkusen centre-back Omer Toprak according to BBC journalist David Ornstein.
Kjaer and Toprak are being considered as alternatives for Valencia full-back Mustafi who the Gunners are yet to agree a fee for.
Turkish intentional defender Toprak did recently reveal that he may consider a move away from Bayer Leverkusen this summer.
Toprak recently hinted he could leave the club but did not confirm who he would be joining – should he leave.
The Turkish international defender was quoted by Turkish-football as saying: “It is not certain whether I will stay at Bayer Leverkusen, we still have a month and anything could happen until them.”
Toprak played 171 times for Bayer Leverkusen in all competitions since joining from Freiburg and has years of Champions League as well as Turkish international experience under his belt.
The 27-year-old was also a target for Manchester United and Borussia Dortmund recently but he was keen on staying at Bayer at the start of the summer transfer window.
The experienced defender has another two-years remaining on his current Bayer deal and has yet to enter talks over negotiating a new contract.
Follow Emre Sarigul @Turkish_Futbol