Austrian Dominic Thiem easily advanced to the US Open second round.
The world three won the two initial sets against Jaume Munar who then withdrew after injury.
Shortly after the promotion, the competition management announced that Thiem would be punished with a fine after violating the rigorous covid protocol during the Grand Slam tournament in Flushing Meadows.
Someone in the Austrian's team was considered to have broken the rules regarding mask use and Thiem must now pay just over SEK 13,000.
Even 32-seeded Adrian Mannarino is punished for violations of the covid protocol, what the Frenchman should do is not clear.