That is the opinion of manager Thomas Tuchel, who was asked about the two youngsters during a recent press conference.
Both players want to prove they can be first team material at Chelsea.
On the flip side, they may want to ensure they are playing regularly, and another loan move for either player is not ruled out either.
"They will come back for sure," the German boss insisted to reporters.
"I want to have them in pre-season, and we will decide in pre-season what goes on.
"It is heavily up to them and how they do."
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