Gianfranco Zola earlier questioned Lukaku’s signing in the summer.
The Blues signed the Belgian striker for £103.50m from Inter Milan last summer and since then he has struggled to cement a place in Tuchel’s system.
Chelsea are currently struggling for wins in the top-flight and Lukaku has been surprisingly poor this season.
Chelsea legend Gianfranco Zola has earlier questioned the purpose of the deal last summer.
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“Chelsea had an extraordinary season last year, but the focus was always on the fact that they lacked a goalscorer,” Zola said.
“They often created chances, and in some games, they were quite penalised. Lukaku comes in to fill that gap, but I liked Chelsea the way they were.
“Werner did a dirty job for everyone else, and the reason they won the Champions League is because he put others in a position to do well.
“I’m curious to see Lukaku, but I liked Chelsea the way they were.”
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