But Rafa Benitez remains unconcerned.
He said: "Higuain has scored in all the other competitions, he is a very important player for us and the goals will come.
"Jorginho was returning from injury today, we lost Gargano and Inler was coming back from international duty. Inter pressed us and I think Inler and David Lopez did fantastic work defending today.
"We must remember David Lopez only just joined us and is still adapting to Italian football, but he's doing a great job."
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