Answer:
Jugar
Step-by-step explanation:
For this example the correct conjugation of Jugar in this case is Jugar
Vamos a ____Jugar___ hoy.
In this Sentence It is used infinitely because "Vamos" is determining the time of the sentence.
In this case Vamos is in "Presente de la primera persona en plural" for this reason de sentence is in Present.