Madison Keys speaks to the media following her 7-6(3), 3-6, 6-3 defeat by Agnieszka Radwanska.

Agnieszka Radwanska speaks to the media following her 7-6(3), 3-6, 6-3 victory over Madison Keys.

Maria Sharapova speaks to the media following her 6-3, 6-7(3), 6-2 victory over CoCo Vandeweghe.

Garbine Muguruza speaks to the media following her 7-5, 6-3 win over Timea Bacsinszky.

Timea Bacsinszky speaks to the media following her 7-5, 6-3 defeat by Garbine Muguruza.

CoCo Vandeweghe speaks to the media following her 6-3, 6-7(3), 6-2 defeat by Maria Sharapova.

Novak Djokovic talks to the media following his 6-7(6), 6-7 (6), 6-1, 6-4, 7-5 win over Kevin Anderson.

Kevin Anderson speaks to the media following his 6-7(6), 6-7(6), 6-1, 6-4, 7-5 defeat by Novak Djokovic.

Serena Williams speaks to the media following her 3-6, 6-2, 6-3 victory over Victoria Azarenka.

Victoria Azarenka speaks to the media following her 3-6, 6-2, 6-3 defeat by Serena Williams.