World number one Iga Swiatek made light work of her US Open opener with a straight-set win over Jasmine Paolini.
Poland's Swiatek, 21, needed just one hour and six minutes to beat the Italian 6-3 6-0 in New York.
It marked her 18th bagel of 2022, while she becomes the youngest player to reach 45 Grand Slam main draw wins since Caroline Wozniacki in 2011.
She will face 2017 US Open champion Sloane Stephens or Belgium's Greet Minnen in the second round.
Two-time French Open winner Swiatek is one of several female players to complain about the "horrible" balls being used at Flushing Meadows.
The US Open is the only major where men and women use different balls.