AUSTRALIAN OPEN
**Venue: **Melbourne Park ** Date: **18-31 January
BBC coverage:](http://www.paklinks.com/sport2/low/tennis/6102132.stm)Every Murray match live on BBC 1 or 2
Daily from 0830 GMT: live on BBC Red Button/website, 5 Live sports extra
Daily from 0000 GMT: text commentary on BBC Sport website
**Former champion Novak Djokovic was well below his best as he beat Marco Chiudinelli in four sets to reach the third round of the Australian Open.**The Serb, 22, dropped the first set and rarely impressed despite recovering to win 3-6 6-1 6-1 6-3 on Rod Laver Arena.
Sixth seed Nikolay Davydenko maintained his fine form with a 6-3 6-3 6-0 thrashing of Ukraine’s Illya Marchenko.
Top seed Roger Federer will take on Romanian Victor Hanescu in the late match on Rod Laver Arena at 0800 GMT.
Djokovic goes on to face Denis Istomin of Uzbekistan after the world number 103 beat Germany’s Michael Berrer 7-5 6-3 6-4.
“I was frustrated, especially at the start of the match, because he was really giving it to me,” Djokovic said of facing Chiudinelli.
"He was very aggressive and stepping in and using every opportunity that has been given to him.
“I automatically just became too defensive and didn’t really make too much, just waiting for his mistakes.”
**Davydenko **took his winning streak to 11 matches as he swept past Marchenko and gave further evidence that he is ready to win a first Grand Slam title.
“I know I’m very good player,” he said. “If I feel good, for sure I can beat everyone, but not every day you can feel good. I hope I can feel every day good here in Australia.”
The Russian will next face Argentina’s 30th seed Juan Monaco, who fought back to beat Michael Llodra of France 3-6 3-6 7-6 (7-5) 6-1 6-3.
Marcos Baghdatis, the 2006 finalist, staged a remarkable comeback on a raucous Hisense Arena, overcoming cramp in the closing stages to beat 17th seed David Ferrer of Spain, 4-6 3-6 7-6 (7-4) 6-3 6-1.
The Cypriot will next play local favourite Lleyton Hewitt, who defeated American Donald Young 7-6 (7-3) 6-4 6-1.
German 18th seed Tommy Haas also needed five sets against Janko Tipsarevic, coming through 4-6 6-4 6-3 1-6 6-3 to set up a clash with Taylor Dent or Jo-Wilfried Tsonga in round three.