Klopp reportedly kept tabs on Portugal international Guerreiro , 22 , during his time as Borussia Dortmund manager .
Is seemingly ready to reignite Klopp 's interest in the player .
Klopp reportedly kept tabs on Portugal international Guerreiro , 22 , during his time as Borussia Dortmund manager and is seemingly ready to reignite his interest in the player .