The group stage's outstanding breakout stars

These guys are expected to provide even better performances in today's Round of 16 games. The United States earned a spot in the round of 16 with a dramatic 1-0 victory over Iran in their penultimate encounter, and the Leeds midfielder Tyler Adams displayed composure on and off the field. The 23-year-old, who was named captain just before the World Cup, set the tone for a young midfield that included Weston McKennie and Yunus Musah.

Prior to the World Cup, Enzo Fernández had never made a start for Argentina, but his contributions in Qatar have elevated him to a crucial position on Lionel Scaloni's team. The 21-year-old midfielder made his debut in his team's 2-0 victory against Poland before scoring a miraculous goal against Mexico off the bench and setting up his team's second goal after making his first start.