Reigning Wimbledon champion the latest top seed to fall . World No . 4 loses in straight sets to world The French ninth seed beat Spain 's Pablo Carreno Busta in straight sets 6-4 6-4 6-4 . No . 145 Juan Martin Del Potro of Argentina TL;DR Serena Williams through to last 16 following win over Varvara Lepchenko . Andy Murray and Novak Djokovic through to last 16 in men 's draw .
Reigning Wimbledon champion the latest top seed to fall . World No . 4 loses in straight sets to world No . 145 Juan Martin Del Potro of Argentina TL;DR Serena Williams through to last 16 following win over Varvara Lepchenko . Andy Murray and Novak Djokovic through to last 16 in men 's draw .