Eintracht Frankfurt chief Markus Krosche insists Randal Kolo Muani will not be sold this month.
The France centre-forward is being linked with Manchester United.
United are seeking a replacement for Cristiano Ronaldo, now of Al Nassr, and Kolo Muani has emerged as a target.
But Krosche says: "We are not going to sell Kolo Muani."
And coach Oliver Glasner also says they will not sell the team's best players in the middle of the season.