Rossi is again battling to recover from a knee injury this season.
"The recovery process is on schedule. I have read and heard all sorts of things, but it is part of the world we live in. That's why I haven't spoken to the media since late August, as more balance and responsibility is needed," said Andrea Pastorello.
"Rossi will be back stronger than before. He faced this injury with the same tenacity and I get the sense he's in a better mood than the other times.
"We know the medical situation and are optimistic. I can clearly say the rumour Rossi's career is at risk is entirely false and without foundation."
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