According to the Mirror, Arsenal pushed ahead with a move for Shkodran Mustafi after being quoted £40 million by Bayer Leverkusen for Omer Toprak.
The Gunners have been on the hunt for a new central defender this summer after losing Per Mertesacker and Gabriel Paulista to injury in pre-season.
The situation saw them starting the season with young duo Rob Holding and Calum Chambers in the centre of defence for the clash with Liverpool, a game they lost 4-3.
They have since seen Laurent Koscielny return but are still in need of a new senior centre half for the new season regardless of that.
They are now edging closer to a move for Valencia defender Mustafi, with BBC Sport reporting he is undergoing a medical this weekend.
However, it appears that the German international was not their only target as they initially moved for Bayer Leverkusen centre back Omer Toprak.
According to the Mirror, they approach Leverkusen about the 27-year-old but were quoted £40 million for his services, a price they did not want to pay.
Instead they returned Valencia and now look set to pay £35 million for Mustafi, according to the same report.