US Open champion Andy Murray wins his opening match at Australian Open

Britain's Andy Murray makes a backhand return to Robin Haase of the Netherlands during their first round match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 15, 2013. (AP Photo/Andy Wong) (The Associated Press)

Britain's Andy Murray applies a ice-towel as he attempts to keep cool during his first round match against Robin Haase of the Netherlands at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 15, 2013. (AP Photo/Andy Wong) (The Associated Press)

In his first Grand Slam match as a major winner, third-ranked Andy Murray opened his Australian Open campaign with a 6-3, 6-1, 6-3 win over Robin Haase of the Netherlands on Tuesday.

Asked what it felt like to play after his triumph at the U.S. Open, where he became the first British man since 1936 to win a major title, Murray said: "I can try and focus on the second part of my career now."