In 1990, Masur helped Australia reach the final of the Davis Cup, compiling a 6–0 record in singles rubbers in the first round, quarterfinals and semifinals. However he was left out of the team that played the United States in the final by captain Neale Fraser. The decision to leave Masur out of the final was fairly controversial at the time given the very significant role that he had played in getting Australia there, but was principally because the final was to be played on clay courts, which was not Masur's best surface. The US team beat Australia 3–2 in the final.