The 10 Best Under-21 Stars of the 2026 World Cup (Explained Simply)

The 2026 World Cup was like a giant spotlight show for young soccer players. It gave kids barely out of their teens a chance to show the whole world what they can do. Many of these players just planted the seeds to become the biggest names in soccer for years to come.

Below are the 10 best players aged 21 or younger from that tournament, explained nice and easy.

Important Point: All these players are 21 or younger. "World Cup" is the biggest soccer tournament where countries play each other. A "club" is the team they play for at home, not their country.

Ayyoub Bouaddi (Morocco)

• Age: 18
• Position: Central midfielder (the player who links defense and attack in the middle)
• Club: Lille

Bouaddi is a big reason Morocco (a country in Africa) is getting really good at soccer. He was born and raised in France and first played for French youth teams, but switched to play for Morocco right before the World Cup.

He already impressed with Lille starting at age 16. A cool moment: he started in a win against Real Madrid (a famous team) on his 17th birthday. At the World Cup, he helped Morocco tie Brazil 1–1 by controlling the middle of the field. He will likely soon move to a giant club for a huge amount of money.

Pau Cubarsí (Spain)

• Age: 19
• Position: Central defense (stops the other team from scoring)
• Club: Barcelona

Most fans knew Cubarsí before the tournament because he helped Barcelona win their league title. But the World Cup pushed him close to becoming a worldwide superstar.

Going into the final, Spain had only let in one goal, and Cubarsí was a huge part of that. Even as a teenager, he might be the best central defender on the planet.

Yan Diomande (Ivory Coast)

• Age: 19
• Position: Winger (plays on the side and tries to create chances)
• Club: RB Leipzig

After a great season with RB Leipzig—where he was named Bundesliga Rookie of the Season (best new player)—he was expected to shine. He is also reportedly close to moving to Paris Saint-Germain.

He didn’t score and only had one assist (a pass that leads to a goal) in a win over Curaçao. But his amazing dribbling (moving the ball past defenders) opened space for teammates. He was explosive in a win over Ecuador and dangerous in a close loss to Germany.

Désiré Doué (France)

• Age: 21
• Position: Winger
• Club: Paris Saint-Germain

Doué is one of many young French players who went from the 2024 Olympics to the 2026 World Cup. He won Ligue 1’s Young Player of the Year twice, the UEFA Champions League twice, and was top young player in both the Champions League and Club World Cup.

At this World Cup, he played well in wins over Senegal, Norway, Paraguay, and Morocco. He scored against Norway and assisted the first goal against Morocco.

Johan Manzambi (Switzerland)

• Age: 21
• Position: Attacking midfielder (helps create goals)
• Club: Freiburg

Switzerland was very good in the tournament except their first game. If Manzambi was healthy against Argentina, things might have been different. Sadly, he got injured before the Colombia game and missed the last two.

But against Bosnia & Herzegovina, Canada, and Algeria, he scored 3 goals and made 2 assists. He can play any attacking spot and mixes speed with skill, making him hard to stop. He may soon join Newcastle United.

Gilberto Mora (Mexico)

• Age: 17
• Position: Attacking midfielder
• Club: Club Tijuana

Mexico didn’t reach the quarterfinals but had bright spots: won its group, beat Ecuador, and only conceded a goal in a 3–2 loss to England.

The biggest positive was Mora. He started Mexico’s last three games and was outstanding, handling pressure well at home and sometimes leading the attack. Club Tijuana has a very valuable player.

Antonio Nusa (Norway)

• Age: 21
• Position: Winger
• Club: RB Leipzig

Norway’s attack tries to get the ball to star Erling Haaland, often through wingers. Nusa has great chemistry with Haaland that will help in future tournaments.

He was quiet in a loss to England but key earlier. He scored an important goal in a 2–1 win over Ivory Coast.

Nico O’Reilly (England)

• Age: 21
• Position: Left back (defends on the left side, also helps attack)
• Club: Manchester City

O’Reilly started five of England’s winning games. He plays a modern fullback style—needs athleticism to defend and push up. His absence against Argentina was surprising, but he’ll be key for years.

He has now played well in the World Cup, Champions League, and Premier League, making him a top left back.

Alex Freeman (United States)

• Age: 21
• Position: Right back / central defender
• Club: Villarreal

Just 18 months ago, Freeman was a backup in MLS with no national team experience. Since then, he became a top defender, moved to Villarreal, and became a starter for the U.S.

At the World Cup, he gave coach Pochettino flexibility with his defense and attack. He scored an important goal against Australia.

Lamine Yamal (Spain)

• Age: 19
• Position: Winger
• Club: Barcelona

Yamal was second in the 2025 Ballon d’Or (a big award for best player). He’s the most exciting young attacker. Entering the final, he had one goal but opened games up for Spain. Against France, he won a penalty and helped set up a goal.

Honorable Mentions

These young players also deserve a shout-out:

• Rayan (Brazil)
• João Neves (Portugal)
• Lucas Herrington (Australia)
• Ibrahim Mbaye (Senegal)
• Mbekezeli Mbokazi (South Africa)

Summary

The 2026 World Cup was a coming-out party for young talent. From 17-year-old Mora to 21-year-old Freeman, these 10 players (and five honorable mentions) showed they will lead soccer into the future. Many already play for giant clubs or will soon.

FAQ

Q: What does "under-21" mean?
A: It means the player is 21 years old or younger during the tournament.

Q: Why is the World Cup such a big deal for young players?
A: It’s watched by the whole world, so a good performance can make a teenager a star overnight.

Q: What is a "winger"?
A: A player who stays on the sides of the field and helps create scoring chances.

Q: What is an "honorable mention"?
A: A player who didn’t make the top 10 but was still very good and worth noting.

Q: Will we see these players again?
A: Yes! Most are young and should be in the next World Cup and other tournaments for years.