Denis Zakaria's agent Mathieu Beda insists the Borussia Monchengladbach star will not be sold in the January transfer window.
Zakaria has been strongly linked with Premier League giants Manchester United and Arsenal after an impressive start to the 2019-20 campaign.
Liverpool, Serie A giants Inter and German duo Bayern Munich and Borussia Dortmund are also thought to be monitoring the Switzerland international, who is currently valued at around £25 million ($32m).
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A bidding war could ignite when the transfer market reopens in the new year, especially if Zakaria continues on his current trajectory.