The pair will be joined by junior champs Matthew Forbes and Iva Jovic in the main draw.
Photographer Matthew Calvis is roaming the grounds of Cincinnati and shares these shots from Queen City.
"For a Serbian athlete, this is the most incredible emotion there is," Novak Djokovic told thousands of fans in Belgrade.
Arthur Ashe Kids' Day is set for Saturday, August 24th.
Defending champion Jessica Pegula on the challenge Amanda Anisimova poses in Toronto final.
The Russian talked openly of his struggles after Saturday's win over Jannik Sinner.
The Italian was struggling physically during his loss to Rublev in Montreal on Saturday night.
