The 2026 FIFA World Cup has arrived. This time it will have 48 nations, 104 matches and a thousand storylines but nothing like the arrival of a new generation of players announcing themselves through their talent on the world’s biggest stage of the game. These are the players who watched the 2022 Qatar finals as schoolboys and are now walking into dressing rooms alongside Messi, Ronaldo and Mbappe.
Some will dazzle. Some may freeze. All of them are worth watching. The list of teenagers to have made their breakthrough at a World Cup is long and includes legends like Pelé, Kylian Mbappé, Michael Owen and Thomas Müller. The expanded format means more nations, more games, and crucially more room for young talent to showcase their game.
Here are 10 under-21 players stepping onto the World Cup stage for the very first time.
Lamine Yamal , Spain, Age 18, FC Barcelona
Yamal is the outstanding player of his generation, arguably even the world's best, regardless of age. The Barcelona starlet finished the 2025-26 season with an astonishing 24 goals and 18 assists in 48 appearances, helping Hansi Flick's side retain the La Liga title. Starting from the right wing, he is far more than a winger and Yamal's close control at pace and the timing of when to accelerate or pause are exceptional. Once he beats the first marker, the options are endless: a darting burst on the outside, a disguised through-ball, a whipped cross, or that trademark diagonal run infield before unleashing a thunderbolt with his left foot. A hamstring injury may delay his World Cup debut to Spain's third group game against Uruguay, but when Yamal runs, the world will see a superstar from the future.
Arda Guler ,Turkey, Age 21, Real Madrid
The Turkish magician has been a well-known name in international football for some time now, but this summer marks his first World Cup. The Real Madrid playmaker racked up a stunning 14 assists in the 2025-26 La Liga campaign. He is expected to operate as Türkiye's No. 10, pushed further up the pitch than his usual deeper role at club level. Technically brilliant, blessed with a remarkable touch and close control, Güler can unlock a game in a flash. His 3.1 chances created per 90 minutes is a startling return for a player who has often operated deeper in midfield. If Türkiye are to live up to their perennial 'dark horse' tag , Güler is the man who must step forward and deliver.
Joao Neves, Portugal, Age 21, PSG
A back-to-back UEFA Champions League winner with PSG, João Neves arrives at his first World Cup as one of the most decorated 21-year-olds in football history. The Portuguese midfielder has formed one of the most compelling midfield partnerships in Europe alongside Vitinha at PSG, bringing ball-winning intensity, precision passing, and a remarkable ability to control the pace of a game. Portugal's Roberto Martínez will look to replicate that partnership at the World Cup, with Neves expected to start alongside his club teammate. In North America's rising summer heat, his fitness, youth and relentless energy could prove to be Portugal's biggest weapon in the later rounds.
Desire Doue , France, Age 20, PSG
Another PSG star in the list, Doue announced himself on the world stage by scoring a brace against Inter Milan in the UEFA Champions League final last year. The Frenchman contributed an extraordinary 32 goal involvements in 61 appearances for PSG this season, playing a significant role in their back-to-back Champions League triumphs. He clocked 13 goals across all competitions in 2025-26. The designated left-winger can perform in all roles up front, including as a false 9, while he offers France another attacker who can turn a game in a flash. With a stack attacking line-up that includes Kylian Mbappe and Dembele, Doue can be the super-sub who can change the game at any moment.
Pau Cubarsi, Spain, Age 19, FC Barcelona
Not every hero at this World Cup will play with flair and flicks. Pau Cubarsí embodies a different kind of brilliance - the cold, composed authority of a centre-back who simply never panics. At 18 years old, the Barcelona defender has already earned a reputation for reading the game like a veteran twice his age. His positional intelligence, aerial dominance and ability to carry the ball out from the back have made him a pivotal figure for both Barcelona's title-winning side and Spain's defensive setup. Spain, as defending European champions and genuine World Cup contenders, need their backline to hold firm in tight knockout games. And for that, Cubarsi’s composure in tight moments will play a key role.
Warren Zaïre-Emery , France, Age 20, PSG
Few 20-year-olds arrive at a World Cup with this much senior experience banked. With 182 competitive appearances already under his belt for Paris Saint-Germain, Warren Zaïre-Emery has become a byword for reliability. A natural box-to-box No. 8, he covers ground, wins duels, carries the ball forward and keeps the passing rhythm ticking, but he has also shown himself capable of playing right back when needed. His 5.47 recoveries per 90 minutes reflect a defensive efficiency rare for a midfielder of his age. In Didier Deschamps' France side, Zaïre-Emery is valued precisely for what he doesn't do: make headlines, take unnecessary risks, or shirk a tackle.
Endrick, Brazil, Age 19, Real Madrid/ Lyon
The weight of Brazil's footballing legacy rests on many shoulders, but none more visibly than Endrick's. The 19-year-old forward arrived at Real Madrid amid enormous fanfare, found himself loaned to Lyon, where he rediscovered his best form and has now earned a place in Carlo Ancelotti's World Cup squad. Brazil legend Cafu himself has picked Endrick as the tournament's breakout star. His World Cup debut will mark his first appearance at a FIFA tournament, arriving with two assists in 14 minutes on his Brazil debut against Croatia earlier this year. Unlikely to start, but in a Brazil squad hunting their sixth world title, Endrick off the bench could be the match-deciding factor.
Yan Diomande , Ivory Coast, Age 18, RB Leipzig
Perhaps no story at the 2026 World Cup is more remarkable than Yan Diomande's. Just four years ago, this teenager was playing high school soccer in Florida. Today, he is a €100 million-rated Bundesliga attacker linked by Liverpool, PSG and Bayern Munich. A sensational debut season in the German Bundesliga with RB Leipzig, Diomande contributed 12 goals and 10 assists and earned the title of Rookie of the year. A winger with real edge to his game, Diomande relies on short bursts of acceleration, sharp changes of direction and an insatiable appetite to take on defenders. Quick, tricky and with a ruthless eye for goal, Diomande is arguably the tournament's most thrilling wildcard and he can pull off a James Rodriguez-style 2014 World Cup campaign in the 2026 edition.
Nico O’Riley, England, Age 21, Manchester City
In his breakout club season, the Manchester City full-back has been crowned the Premier League's Young Player of the Season after featuring in 34 matches for City this term, with England head coach Thomas Tuchel handing him a World Cup call-up even as big names like Cole Palmer and Phil Foden missed out. He scored both goals in the EFL Cup final against Arsenal, earning Man of the Match at Wembley. The left-back has registered nine goals and six assists in this season. His versatility should also suit Thomas Tuchel's preference for using inverted fullbacks to create overloads in central areas, as Tuchel prefers to play a 3-man defence in the back.
Lennart Karl , Germany, Age 18, Bayern Munich
Karl's superb debut senior season at Bayern has already seen him produce nine goals and eight assists for his club, while he played a crucial role in Bayern's Champions League run to the semis. His goal against Club Brugge in October made him the youngest Bayern player to score in the Champions League, aged 17 years and 242 days. At 18, he is the youngest call-up in Germany's entire World Cup squad. In Germany's pre-tournament win over Finland, Karl became the youngest player since records began in 2005 to directly contribute to a goal for the German national team. An xG of 0.53 per 90 minutes is indicative of his consistent attacking input and can play a decisive role from the bench for Germany in this campaign.
There are some more names who can also make a great impact in their debut World Cup campaign for their respective countries. Kenan Yildiz (Turkey), Luka Vuskovic (Croatia), Rayan (Brazil), Kobbie Mainoo (England), Ibrahim Mbaye (Senegal), Nico Paz (Argentina), Gilberto Mora (Mexico, the youngest player at the entire tournament), Kendry Páez (Ecuador), Jorrel Hato (Netherlands) and Nestory Irankunda (Australia) are some names. These U21 debutants have the potential to steal the show during the upcoming World Cup.
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