Aston Villa are among the teams being linked with defence-midfielder Denis Zakaria.
The Borussia Monchengladbach star is out of contract in the summer, and is not signing a new deal.
Gladbach may be considering selling him in January to recoup some money, rather than losing him on a free at the end of the season.
All three clubs will be eyeing a January move as a way to steal a march on other teams pursuing the midfielder.
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