Britain’s Emma Raducanu will face 23-time Grand Slam singles champion Serena Williams for the first time in her career on Sunday.
The pair have been drawn together in the first round of the Western and Southern Open in Cincinnati.
Earlier this week, Williams suggested she would soon retire from tennis, saying she will be “evolving away” from the sport after the US Open.
Raducanu is preparing to defend her US Open title later this month.
The British number one won the Flushing Meadows tournament last year as an unseeded 18-year-old, 22 years after Williams won her first Grand Slam singles title in New York, aged just 17.
The winner will face either Victoria Azarenka or Kaia Kanepi in the second round of the Cincinnati tournament.