Leicester City have approached VitoriaGuimaraes for defender Edmond Tapsoba.
The Daily Mail says Foxes manager Brendan Rodgers wants cover for Jonny Evans and Caglar Soyuncu while Filip Benkovic is wanted on loan by Middlesbrough and Derby.
They have asked about Jannik Vestergaard at Southampton but have been put off by their £18million asking price.
The 20-year-old Tapsoba, a Burkina Faso international, has interest from Bayer Leverkusen also and is regarded as top young prospect.
Guimaraes want around £17million for the 6ft 3ins centre back but may negotiate over a structured payment deal.