Here is a comprehensive summary of the article:

Hamza Abdelkarim Selim, born in 2008, is a rising Egyptian striker currently playing for Barcelona Atlético and the Egypt national team. He made history with Al Ahly in February 2025 by becoming the club's youngest player of the 21st century, before securing a permanent move to Barcelona in June 2026 for €1.5 million after impressing in pre-season friendlies, notably scoring against Basel and his former club. On the international stage, he helped Egypt win U17 UNAF titles and qualified for the 2025 U17 World Cup with his performances. He was called up for the 2026 FIFA World Cup in May 2026, making his senior debut against Russia just days before the tournament. On 15 June 2026, he made his World Cup debut against Belgium, becoming the youngest Egyptian player to feature in the tournament at just 18 years and 165 days old.