American Frances Tiafoe - whose video protesting about the death of George Floyd has been widely viewed - says athletes do not always appreciate the influence they have.
The 22-year-old, a quarter-finalist at the 2019 Australian Open, posted an Instagram video also featuring Serena Williams, Naomi Osaka and Coco Gauff.
In the video, Tiafoe and his girlfriend, Ayan Broomfield, put their racquets down and raise their hands to "spread awareness about the unjust deaths of many African-Americans".
Widespread protests have taken place across 75 US cities since Floyd, an unarmed black man, died after being pinned down by a white police officer.