Summary
Defending champion Serena Williams out in second round
Top seed loses 6-2 6-2 to Spain's Garbine Muguruza
Novak Djokovic sees off Jeremy Chardy 6-1 6-4 6-2
Roger Federer beats Diego Sebastian Schwartzman 6-3 6-4 6-4
* denotes next server
Defending champion Serena Williams out in second round
Top seed loses 6-2 6-2 to Spain's Garbine Muguruza
Novak Djokovic sees off Jeremy Chardy 6-1 6-4 6-2
Roger Federer beats Diego Sebastian Schwartzman 6-3 6-4 6-4
* denotes next server