Australian Open 2014: Andy Murray seeks edge after back improves

British number one Andy Murray says his back feels "much, much better" but is seeking the edge that playing matches will bring as he prepares for his opening match of the Australian Open on Tuesday.

The Wimbledon champion, who has reached the final of the first Grand Slam of the year three times in his career, had surgery on his lower back in September.

The 26-year-old Scot faces Japan's Go Soeda in the first round in Melbourne.