According to Bild, Tuchel told the dressing room: "Everyone can show up for the new coach now."
The Bayern boss then urged his team to finish the season strongly, adding: "There are no longer discussions every week, everyone knows about it. We can still achieve something, we have to win."
Bayern chief executive Jan-Christian Dreesen also had some harsh words for the players. "We will now look closely," he said. "You are responsible!"