Roberto De Zerbi says his goal-making left-back is becoming a “complete” player.

Pervis Estupinan was denied a first Premier League goal by a VAR error at Crystal Palace.

But he later set up the opener for Solly March and has now provided five assists in the last six league and cup games.

Estupinan has served up a series of exciting performances down the left.

Head coach De Zerbi said: “He’s very important in build-up but he’s becoming a complete player now.

“And our target is to help the players to become complete.

“They have to be able to play in every part of the pitch.

“They are able to understand the play.

“They are able to understand before to receive the ball, what is the next line of pass open.

“And for this I’m very happy.”

De Zerbi believes Estupinan’s Ecuadorean compatriot Moises Caicedo has not yet recaptured his very best form since transfer approaches from Arsenal late in the January window.

But he is not concerned about the midfielder.

He said: “I think he’s played well but he can play better.

“For sure in the last period he suffered this, the transfer market situation, but we wait for him because it’s too important for us.

“Caicedo is a problem if he plays for another team, not for us.”

Albion return home on Saturday for a sold-out Premier League clash with seventh-placed Fulham.