Chelsea boss Mauricio Pochettino is convinced by the potential of Nicolas Jackson.
The new arrival from Villarreal struck in victory over Brighton in Philadephia.
Pochettino said: "I think when Chelsea sign a player like him it's because they detect something important in quality and talent.
"He is a big talent, he needs time to adapt to the new club, the Premier League.
"He is young also, we need to help him to develop and evolve and be an important player for Chelsea."