As per Sofascore, who awarded Merino a score of 7.1 out of 10, the Arsenal player won nine ground duels and chipped in with three tackles.
Merino also boasted an 80 percent pass accuracy rate, completed four of his five dribbles, and found the target with three of his four long-ball deliveries.
Spain have now secured top spot in Group A4 thanks to their win over Denmark.
The European champions were already through to the quarter-finals but needed to win at Parken Stadium to progress as winners.
