Marseille have been linked with the Hornets striker, who has had to make do with a bit-part role this season and made just six appearances so far.
“The interest from OM? It's a bit early to talk about Marseille. Stefano's desire during this transfer window is to do what he likes, play football," brother and agent Carlo Okaka said.
“Ligue 1 is a very good competition, with many good clubs at the highest level. So yes, we are interested to go to France."