Serena Williams' lasting influence on young black athletes
Serena Williams' hopes of securing a calendar Grand Slam were ended in stunning fashion by Italy's Roberta Vinci in the US Open semi-finals.
But Williams and her sister Venus have already created a legacy by inspiring more African-American children - especially those from low-income areas - to play tennis. The sisters have championed a tennis centre in the Anacostia neighbourhood of Washington, DC, devoting time and money to it's development.
Tennis students taking lessons at the Venus and Serena Williams Tennis Arena at the Southeast Tennis and Learning Center tell the BBC how the sisters have inspired them.
Produced by Sarah McHaney, filmed by Colm O'Molloy, edited by Olivia Lace-Evans.