Former U.S. Open champion suffers shock third - round exit from Australian Open . Unseeded Jeremy Chardy from Canada beats sixth - seed Argentine in five sets . Andy Murray is also safely through to the fourth round after beating Lithuanian qualifier Ricardas Berankis 6-3 6-4 7-5 . Roger Taylor , Andy Murray safely through to fourth round with straight - set wins . Serena Williams and Sloane Stephens into fourth round in women 's doubles .
Former U.S. Open champion suffers shock third - round exit from Australian Open . Unseeded Jeremy Chardy from Canada beats sixth - seed Argentine in five sets . Roger Taylor , Andy Murray safely through to fourth round with straight - set wins . Serena Williams and Sloane Stephens into fourth round in women 's doubles .