Steffi Graf
- Steffi Graf
- Serena Williams
- U.S. Open
- Williams Sisters
- wimbledon
- Maria Sharapova
- Serena Slam
- Martin Morse
- Venus Williams
- #usopen
- Venus
- Serena
- U.S. Open quarterfinals
- prize money
- rematch
- MM Leverage
- WTA
- tennis
by Stacey Tisdale
- pay gap
- Serena Williams
- U.S. Open
- women and money
- Floyd Mayweather
- Roger Federer
- USTA
- blacks and money
- tennis
- Maria Sharapova
- Serena Slam
- Martin Morse
- Steffi Graf
- U.S. Open 2015
- MM Group
by Stacey Tisdale
