Maurizio Sarri has urged Marcos Alonso to improve on the defensive side of his game if he is to become the best left-back in the world.
“Alonso, at the moment, this position at left-back is maybe the best in Europe,” Sarri said.
“Physical qualities at a top level, I think. He’s doing very well in the offensive phase.
“But I also think he can improve in the defensive phase. If he improves that, he could be the best left-back in the world.”