British number one Andy Murray has admitted that he is eager for more success after a breakthrough 2012.
The 25-year-old won the first Grand Slam of his career last year when he won the US Open, coming off the back of a gold medal at the London Olympics.
Heading into Monday's Australian Open, the world number three concedes that he is keen for more titles in 2013.
"The US Open and the Olympics made me extremely motivated," Murray told The Telegraph. "It wasn't a case of, 'Oh, everything's done now'. It's taken a long time to get there and to win those sorts of events.
"I know the feeling when you do win them now and it's worth all of the work that you put in.
"In the past, there were loads and loads of questions. I wasn't physically strong enough. I wasn't mentally strong enough. I didn't listen to my coaches. I was spoilt. Whatever it was, none of that really bothers me anymore. I'm just looking for ways to keep improving."
Murray goes into the tournament having successfully defended his Brisbane Open title after a straight-sets victory over Grigor Dimitrov.
