Edu has lifted the lid on the research that goes into transfer targets.
He told the Mirror: "On my desk I have reports with over 180 pages on one player. It is really detailed. Physical, technical, mental profile - whether you have Premier League experience, whether you will be able to adapt. They have it all.
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"We analyse our shortcomings, where we can improve, where we can invest, and from there we go in search of this new name.
"We have been discussing what I should do now since January. It's not my decision or Mikel's (Arteta). It's a whole group's."