The German coach has challenged the 20-year-old to earn his place in the Blues' starting XI after being forced to remain at Stamford Bridge
Thomas Tuchel says it was "simply impossible" for Chelsea to allow Callum Hudson-Odoi to leave in the final day of the transfer window.
The Premier League side blocked the 20-year-old winger from making a move to Borussia Dortmund at the end of August.
Hudson-Odoi was left on the bench for the Blues' first three matches of the season, but was called on to start in the 3-0 win against Aston Villa on Saturday.