How to Say "the front-runner" in Spanish
The Spanish word for “the front-runner” is “favorita” — A2 level. This is a very common word in everyday Spanish.
English → SpanishA2
NounA2
in a competition

Examples
Ella es la favorita del profesor.
She is the teacher's favorite.
La corredora de Brasil es la favorita para ganar la maratón.
The runner from Brazil is the favorite to win the marathon.
Aunque es la favorita, no debemos subestimar a las otras.
Even though she is the front-runner, we shouldn't underestimate the others.
Noun Use
When 'favorita' is used as a noun, it almost always needs an article (like 'la') in front of it to mean 'the favorite person/thing'.
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