Melbourne, Jan. 23 : Britain''s Andy Murray needed only to appear on court at Rod Laver Arena to make it into his fifth successive grand slam quarter-final on Monday.
Murray, the fourth seed, took the first two sets from Mikhail Kukushkin of Kazakhstan 6-1 6-1 before his opponent withdrew from the match with a hip injury after losing the first game of the third set, The Age reports.
Kukushkin was clearly troubled by the problem throughout their fourth round match.
He offered only token resistance to Murray after previously playing one of the most entertaining matches of the championship to beat Frenchman Gael Monfils in five sets.
For Murray the win put him one match closer to the grand slam title he has come so close to on three occasions.
The runner-up at the past two Australian Opens, Murray was also a beaten finalist at the 2008 US Open.
He was also a semi-finalist in the final three grand slams of 2011. (ANI)

Ramallah, May 20 : High on confidence after notching up a double-win over Bahrain in two international friendlies in the latter's own backyard, the Indian women's football team will look to carrying on
New Delhi, May 21 : Former Ranji player Baburao Yadav is the latest to be arrested for spot fixing in the Indian Premier League, Delhi Police said Tuesday.
New Delhi, May 20 : Mumbai Indians skipper Rohit Sharma doesn't want his team to get distracted by the spot-fixing controversy in the Indian Premier League (IPL) and says the focus is on playing good cricket
Mumbai, May 15 : India's only motorcycle Grand Prix team resumes battle in France this weekend with high hopes of strong results after a top-10 start for the all-new Mahindra Grand Prix machine.
Dijon-Prenois (France), May 13 : Indian racing driver Sailesh Bolisetti's second weekend of his 2013 Euro Race Car campaign ended on a disappointing note as he finished 18th and 17th in the two races here.