Chelsea boss Thomas Tuchel says Callum Hudson-Odoi earned his chance in victory over Aston Villa.
Hudson-Odoi played his first league game of the season on the day.
"Callum has to overcome the gap between training and games. I see a stronger and stronger Callum every day in training, and he needs to show this kind of determination in games that he shows in training," said Tuchel.
"He is able to play as a right wing-back, as a left wing-back, in the two half-10 positions. He knows the group, we know him very well.
"If he gets minutes it's never a gift. We take hard decisions. He needs to deserve it and he deserves to play. I know it's not his favourite position, but he can play it and serve the team when it's necessary. Today it was, and still he can do better, be more aggressive, and still he can push himself to the limits.
"He needs to overcome this gap to fight for his place in the squad. This is life at Chelsea."
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