Indian Wells CEO Raymond Moore said Sunday that the WTA rides on the coattails of the men's game and also lauded "attractive" female players.
Serena and Venus set up an all-Williams semifinal in the Rogers Cup.
Serena Williams looked healthy and played sharp in her first tournament since defaulting during a doubles match with sister Venus at Wimbledon.
Sloane Stephens' streak of reaching the second week at six consecutive Grand Slam tournaments ended Monday at Wimbledon with a 6-2, 7-6 (6) first-round loss to 109th-ranked Maria Kirilenko of Russia.