Chelsea boss Frank Lampard found a positive in Christian Pulisic's performance in defeat to West Ham United.
Pulisic had an assist in both of Willian's goals on the night.
Lampard said, "It is a big positive, he is playing well as everyone can see, plus with Willian as the two wingers, Willian got his two goals. Christian had a patch running up to Christmas when he was playing towards his level as well and he got injured and was out for a long time.
"So it is nice to see him back, fresh and hungry and playing with the quality he has. He is going to get better. He is a young player with great talent."