Federer beat Istomin 7-5, 6-3.
Djokovic beat Hewitt 4-6, 7-5, 6-1. He meets Tsonga in the quarter finals.
Murray has just beaten Baghdatis 4-6,6-1, 6-4. He meets Almagro in the quarter finals.
Azarenka beat Petrova 7-6, 6-4. She meets Angelique Kerber (who beat Venus Williams) in the quarter finals.
Serena Williams crushed Vera Zvonareva 6-1, 6-0.
Sharapova beat Lisicki 6-7, 6-4, 6-3.