The sentence is grammatically incorrect. Correct sentence is: "Los estudiantes están jugando tenis".
How to check a sentence in Spanish
In this question we must check the consistency of a sentence written in Spanish, that is, if the verb is conjugated according to the characteristics of the subject.
After a quick analysis we notice that pronoun behind the subject "los estudiantes" is "ellos", then, the verb "verb" must be "ellos están". Thus, we may conclude that the sentence is grammatically incorrect.
To learn more on sentences in Spanish, we kindly invite to check this verified question: https://brainly.com/question/24717242
