Naomi Osaka's defence of the US Open title continued with a walkover after Serbian opponent Olga Danilovic pulled out of their second-round match.
About an hour before the pair were due to walk out on Arthur Ashe Stadium, organisers announced Danilovic, 20, had withdrawn for medical reasons.
Third seed Osaka will play Estonia's Kaia Kanepi or Canada's Leylah Fernandez in the third round on Friday.
The Japanese player, 23, is aiming for her third US Open title in four years.
