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Chelsea striker Tammy Abraham scored his eighth goal of the season as Chelsea beat Lille 2-1 on Wednesday.
It was also his first Champions League goal, which he scored on his 22nd birthday.
Willian believes Abraham can become one of the best strikers in the world after the 22 year old’s brilliant start to the season.
“He can become one of the best strikers in the world. He is only 22 and he has everything,” the Brazilian told the Evening Standard.
“I’ve played with good players, good strikers like Diego Costa and Fernando Torres. Now Tammy can become one of the best.
“I don’t know if he can be better than them but I think he can, potentially. He just has to improve every day because in football you need to do that.”