Current Pompey manager Alain Perrin is under pressure as his side have made a poor start to the season and media reports had suggested that the United boss was being targetted as a possible to replacement for Perrin.
"I don't like to comment on speculation because that is all it is," said Warnock.
"I don't think he (Perrin) has done a bad job there and I'm happy with the situation here. Things are going well in the league, so I'm happy here."