Scotland assistant coach Mark McGhee is unsure of their chances of capping Cardiff City captain Steven Caulker.
Caulker is on Scotland's radar, despite playing and scoring for England in a friendly.
McGhee said: "He's someone who does [meet the criteria] as I understand it.
"We know who the boy is, we knew him before when he was at Tottenham. I don't know any more than that."
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