But Tuchel insists he still plans on using the Spain international, stating before Wednesday's clash with Zenit St. Petersburg: "He's one of the guys that needs minutes.
"He is always in our thoughts and we think about every training session and form.
"We try to encourage him because he grows into Chelsea more and more. We will not stop encouraging him and trying to bring out the best. It's a high possibility he will improve tomorrow."
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