el único problema

the only problem

→ el
phrase Rare #28,272
the only problem Often used to introduce a difficulty, limitation, or caveat. The phrase can also appear after a negation to mean "the only problem."
SP: El único problema es que no tenemos suficiente tiempo.
EN: The only problem is that we don't have enough time.

Ese no es el único problema.

That’s not the only problem.

No era el único problema.

It wasn't the only problem.

El único problema era que para todo el mundo, él ni siquiera existía.

The only problem was that, to everyone else, he didn't even exist.

— La leyenda del pianista en el océano (1998)

Y ese no es el único problema.

And that's not the only problem.

— Ghost in the Shell (1995)

Este no era el único problema.

This was not the only problem.

Ese no era el único problema.

That wasn't the only problem.

El único problema es conseguir una llave.

The only problem is getting a key.

— Uno de los nuestros (1990)