When she arrived, however, there was a problem.

She got there on a Friday; the championship was on Sunday. And per the country’s laws, she was required to remain in her hotel room for 14 days before going anywhere else on the islands.

To elude the restrictions, Ms. Mack, after receiving a negative coronavirus test, slipped an electronic monitoring bracelet from her wrist and escaped to a beach on Grand Cayman’s South Sound, where she saw Mr. Ramgeet win first place.

But the event organizers were notified that Ms. Mack may have been in breach of the rules and the police were called, her lawyer said. Ms. Mack was charged with leaving her home during the quarantine period, and Mr. Ramgeet was charged with aiding and abetting her. They were sentenced to four months in prison for the quarantine breach.

“This was as flagrant a breach as could be imagined,” Justice Roger Chapple said in court during the sentencing, according to the Cayman Compass, a news website in the Cayman Islands. “It was born of selfishness and arrogance.”

The islands, a British territory of nearly 65,000 residents, have reported 316 infections and two deaths, as of Monday. Only people who have been preauthorized to enter the Cayman Islands can travel there, and they must quarantine for 14 days in a government facility or at home, if approved, according to the British government.