Romero, aged 15 years and 219 days, came on from the bench in the 83rd minute of Mallorca's 2-0 defeat in the Spanish capital on Wednesday.
✍🏻 ¡Bravo, Luka! 👹 https://t.co/nnWKdW5AKO— Real Mallorca 🧗🏽👹 (@RCD_Mallorca) June 24, 2020
The teenager – who replaced midfielder Iddrisu Baba for the closing stages – broke the record previously held by Francisco Bao Rodriguez, known as Sanson, who made his league debut for Celta Vigo aged 15 years and 255 days in 1939.
Though goals from Vinicius Junior and Sergio Ramos were ultimately enough to secure a comfortable victory for Madrid, it is sure to have been a day to remember for Romero, who had two touches of the ball, won one foul and completed the only pass he attempted.