The United States Grand Prix in the dry desert city of Phoenix was moved to the start of the season in March to avoid the intense 100+ °F heat the city experiences in summer, although the previous year's race was run in June because it was given at such short notice. Swiss driver Gregor Foitek made his Formula One race debut for the Brabham team. He had attempted to qualify for races during the 1989 season, failing to make the grid in eleven qualifying attempts for EuroBrun and one for Rial.
