Defending champion Naomi Osaka is through to the third round of the 2021 US Open by walk-over.
This was after her planned opponent Olga Danilovic withdrew from the tournament on Wednesday.
US Open officials said Danilovic was unable to contest the second-round game for “a medical reason”.
They however gave no further details.
World number three Osaka next plays Kaia Kanepi of Estonia or Canadian Leylah Fernandez.