Chelsea boss Thomas Tuchel admits Toni Rudiger's contract situation is a concern.
The defender's current deal expires at the end of this season.
Tuchel said: "I hope they find a solution but it is not only between coaches and players, and what we wish for.
"It is between the club and the player and the agent.
"He has been excellent, a very consistent player on a high level. He's calm and focused. Everything is in place but sometimes players need a bit longer. It's nothing new from our side."
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