A diagonally divided black-and-white flag is displayed with a car number to indicate a warning for unsportsmanlike conduct. This flag can be displayed if a car tries to intentionally drive another car off the course, or if a driver gets out of his or her car and initiates an altercation with another driver. The black and white diagonal flag can also mean a warning to a driver for exceeding track limits. For example, Charles Leclerc was shown this flag for "bad sportsmanship" while defending from Lewis Hamilton during the 2019 Italian Grand Prix.