'There is'/'there are' in indirect speech is just esse, as in this passage from Pliny the Younger's letters (1.11.1):
at hoc ipsum scribe, nihil esse quod scribas, vel solum illud unde incipere priores solebant: 'si vales, bene est; ego valeo.'
Yet write this very thing, that there is nothing....
In indirect speech, there's always some risk of a loss of accuracy or introduction of ambiguity. For example, distinctions between the different past tenses (perfect vs. imperfect vs. pluperfect) become lost, all being replaced by a simple perfect infinitive, and 3rd person reflexive pronouns (se, sibi, etc.) might refer to the subject of the main sentence or to the subject of the indirect statement.