Murray rolls into quarterfinals at Aussie Open

Last year's runner-up Andy Murray was round action at the Australian Open.

Murray, the No. 4 seed, improved to 16-2 in Melbourne over the last three years with a 6-1, 6-1, 1-0 victory over Kazakhstan's Mikhail Kukushkin, who retired from the match due to an injury.

Murray lost to Novak Djokovic in last year's Aussie finale and was also the runner-up to Roger Federer two years ago.

Sixth-seeded Jo-Wilfried Tsonga is currently in action against 24th-seeded Kei Nishikori of Japan. Fifth-seeded Spaniard David Ferrer will take on 17th- seeded Frenchman Richard Gasquet later Monday.