The left-back vowed at the start of the summer to get a tattoo of the coach's face if Spain won the tournament, which they did by beating Argentina 1-0 on July 19th in the New Jersey final.
Real Madrid's Cucurella posted a photo of his new tattoo on social media along with the words "promise kept".
In his tattoo, De la Fuente is depicted wearing a suit and brandishing the World Cup trophy, Spain's second after they first triumphed in 2010 in South Africa.
"Historic," wrote Cucurella's Spain teammate Mikel Merino on his Instagram post, while tennis star Carlos Alcaraz said it was "awesome".
Cucurella, 28, joined Madrid from Chelsea ahead of Spain's first game at the World Cup, a frustrating 0-0 draw against Cape Verde, which De la Fuente said helped provide the team motivation on their run to glory.
The 65-year-old coach was appointed as Luis Enrique's successor in 2022 and has also won Euro 2024 and the Nations League in 2023 with La Roja.
FIFA World Cup 2026
The 2026 World Cup took place from June 11th to July 19th in the United States, Canada and Mexico. The tournament featured 48 national teams and was won by Spain, who beat Argentina in the final.
Full schedule and results | Group standings and bracket | Past winners of the tournament | Our team of the tournament | About the 2030 World Cup