World No. 1 and defending US Open champion Aryna Sabalenka says rivals Iga Swiatek and Coco Gauff present "the biggest challenge" to her on a physical level.
Many expected Coco Gauff to be bitterly disappointed with her US Open defeat to Naomi Osaka, but instead she is optimistic about her progress.
Naomi Osaka served notice that she could be heading for a third US Open title after crushing Coco Gauff 6-3, 6-2 in their last-16 clash at Flushing Meadows.
Second seed Iga Swiatek's sublime summer continued with a record-breaking opening-round victory at the US Open on Tuesday.
World No. 2 Coco Gauff needed just 70 minutes to defeat world No. 37 Wang Xinyu, prevailing 6-3, 6-2 to reach the third round of the Cincinnati Open.
Aryna Sabalenka said it is "painful" to be remembered only for her Roland Garros outburst and that "everyone judges you" for a comment made in the heat of the moment.