The Athletic Bilbao star has expressed his admiration for the Barcelona midfielder and feels he could go on to become the finest in his position if he continues his progression
The side's impressive displays in the tournament have been considerably influenced by the quality of Italian-born Thiago in midfield, and his compatriot Muniain, who also put in a positive shift in the semi-final against Belarus on Wednesday, was glowing in his analysis of the 19-year-old.
"From the first moment I saw him, I knew he would be a great footballer," said Muniain in an interview with Efe. "You do not have to understand much to know that Thiago does magic with the ball."
""What he does is simply different, it's within the reach of very few and without doubt in just a few years we'll be talking about him as the number one."
Luis Milla's young side have been the standout performers in this year's U-21 European Championship, and are the favourites to lift the trophy in Aarhus on Saturday.