The two out of favour superstars are being linked with loan moves to the Catalan club, who are struggling financially.
Spanish reports had claimed that Barca will turn to Werner and Ziyech in the winter, as they are being priced out of a move for Manchester City's Ferran Torres.
However, Sport suggests that Chelsea boss Tuchel was blocking any loan moves for Werner or Ziyech.
He wants to maintain a deep squad for the various competitions they are competing in for the rest of the season.
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!