Arsenal to sign mystery centre-back Imminently?

ESPN Brazil’s Bruno Andrade claims the Gunners could complete a deal for a centre-back imminently.

Who the defender is, is still a mystery... rare in this day and age. 

The information is said to have come from a source close to the Bruno Guimarães transfer.

With no clear timescale on Saliba’s injury, another natural centre-back would make sense. Mosquera is solid cover, but most of Arsenal’s other options are players filling in rather than specialists.

So, who do we think it is?