Novak Djokovic won his first match of the year when he defeated Lorenzo Musetti.
The Australian Open title was not defended because the man was deported for being unvaccinated.
The United Arab Emirates allowed him in, and he made a lot of money at the tournament. The Monday crowd was happy to see him, as he was welcomed with a standing ovation and phone cameras flashing when he was introduced. He made his way to his position by the judge's chair after he responded with an emphatic wave.
Musetti took two sets off Djokovic at the French Open last year, but on a warm evening in the United Arab Emirates, the Italian wild card couldn't convert any of his break chances.
There were times when I played well, but there were also times when I made a couple of unforced errors. It is normal to expect that in my first match after a while.
He will face either Karen or Alex de Minaur.
Andy Murray won his first match since winning the title. He beat Christopher O&Connell after three hours.
The report was contributed to by the Associated Press.