Six-time champion Serena Williams made her return to the US Open with a clinical first-round win over Poland's Magda Linette.
Williams, 36, missed her home Slam last year, giving birth to daughter Olympia shortly after the tournament started.
Opening Monday's night session at Arthur Ashe Stadium, she won 6-4 6-0 against her 68th-ranked opponent.
The 17th seed will meet Germany's Carina Witthoeft in the second round.
Williams is still on course to meet older sister Venus in the third round, although the prospect of facing world number one Simona Halep - her projected last-16 opponent - has disappeared after the Romanian's shock defeat by Estonia's Kaia Kanepi.
Although she will face tougher challenges, Williams looks well placed to challenge for the record-equalling 24th Grand Slam on the evidence of her victory over Linette.
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