Moreno de Alboran played collegiate tennis for University of California, Santa Barbara, and he made sporadic appearances on the ITF circuit.

[2] He turned professional in 2019, and following a period of inactivity caused by the Covid-19 pandemic, he progressed to regular appearances on the ATP Challenger Tour during the second half of the 2021 season.

[3] He also qualified for the 2023 Sofia Open, making his ATP debut, entering the main draw as lucky loser but lost to Jurij Rodionov.

[7] At the beginning of the clay court season he also qualified for the 2024 Grand Prix Hassan II and defeated fifth seed Facundo Díaz Acosta and David Goffin to reach his first ATP quarterfinal of his career.

Moreno Alboran earned the USTA's reciprocal wildcard for the 2024 French Open after winning the men's Roland Garros Wild Card Challenge,[8] where he made his debut at this Major.

[14] He trained at Dukes Meadows in Chiswick and represented Spain in junior events, then switched to the United States.