Ruben Amorim says Manchester United are focused on their "own problems" rather the struggles of rivals Manchester City before Sunday's derby at Etihad Stadium.
Premier League champions City have won just one of their last 10 matches in all competitions, seven of those defeats, and dropped to fourth place and eight points behind leaders Liverpool, who also have a game in hand.
Amorim has won three of his six matches in charge in all competitions, but United have lost back-to-back Premier League games to sit 13th in the table.
And despite City's poor form, the Portuguese said: "I never think about these things.