JORGE VALDIVIA
Jorge Valdivia has overcome discipline issues, which kept him out of the national squad under Sampaoli's predecessor, to orchestrate Chile's attack.
The midfielder, who plays for Brazilian club Palmeiras, is known for his vision and passing skills.
Sampaoli has warned that Valdivia, who is recovering from injuries and struggles to play 90 minutes, needs to be in top physical shape if he wants to play at the World Cup.
