The 16-year-old scored in the Europa League clash with Young Boys Bern earlier this week and became the club’s youngest ever goalscorer.
“A footballer of this class integrates themselves very well – football only has one language, and Iker has mastered it,” Etxeberria enthused to Radio Euskadi.
“It’s very positive news, even aside from his goalscoring contribution to the team. Muniain will certainly be a quality player, not just for this team.
“If he continues along this path, I believe he will become a world class player.”
