The Bundesliga outfit are bracing themselves for the departure of Erling Braut Haaland and are already searching for replacements for the Norwegian striker.
Marco Rose is keen to bring in a new centre forward and a winger to bolster his attacking options when Haaland does leave the club.
Werner is said to be considering his future at Stamford Bridge following the arrival of Romelu Lukaku in the summer, which has limited the German to just four Premier League starts so far this season.
Hudson-Odoi, despite being highly rated by the Blues, is also struggling for game time and has featured only three times in the league in 2021-22.
Meanwhile, Pulisic has not featured since the opening weekend of the campaign - when he scored against Crystal Palace - having picked up an ankle injury. body check tags ::