The 20th annual Laureus World Sports Awards will take place on Monday in Berlin, with Lionel Messi and Liverpool in the hunt.
Sofia Kenin blitzed Anastasija Sevastova to give the USA the perfect start, while Serena Williams battled past Jelena Ostapenko.
Former world number one Naomi Osaka was distraught after a crushing Fed Cup defeat to unheralded Spaniard Sara Sorribes Tormo.
Coco Gauff claimed another famous scalp in defending champion Naomi Osaka, as Serena Williams also suffered a shock defeat.
Naomi Osaka was full of self-reflection after her Australian Open title defence ended at the hands of teenager Coco Gauff.
Coco Gauff, 15, produced a masterful display to beat defending Australian Open champion Naomi Osaka 6-3 6-4.
It was a good day for the favourites in the women's draw at the Australian Open, with Ash Barty and Serena Williams winning through.
Naomi Osaka was left battled by one question following her second-round win over Saisai Zheng in Melbourne.
In warm but breezy conditions in Melbourne, third seed Naomi Osaka defeated Saisai Zheng 6-2 6-4 on Margaret Court Arena on Wednesday.
The world's top women got the job done on Monday, with Ash Barty joining Naomi Osaka and Serena Williams in round two in Melbourne.