To answer your question tho we have only been rumored with 2 players I've seen so far ( it is extremely early tho )I know we are saying we need good defenders but who is even on the market right now?
Cristián Zapata - AC Milan CB free agent this summer, just coming back from a long injury and unused in abysmal AC Milan, tho he is an NT regular and his nation fans are fond of him
Neven Subotić - Dortmund CB also coming off a long injury and way out form at his club.
That is all I have seen so far, but there is about 8 ligs in south America and 15 in Europe filled with potential CBs we could be scouting.
If I was a hired scout and could devote 8 hours a day 5-6 days a week I'm sure I could give you a pretty big list
Tho I have confidence in this board so let's see who they come up with throughout this summer