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NOVAK Djokovic insists he has recovered from illness threatening to derail his Australian Open campaign.
Djokovic's health has been the subject of rampant speculation over the past 48 hours following his failure to practise on Saturday.
The world champion last night admitted he had endured a "tough couple of days".
Djokovic's disjointed preparation appeared to be compromised further yesterday when he had his right shoulder manipulated by a member of his support staff during practice.
But the reigning Wimbledon champion is adamant he is fine to start his quest for an Open era record fifth title tomorrow.
"I had tough couple days. But it's all behind me now. I'm ready for the Open," Djokovic said.
Argentine Juan Martin del Potro however faces an uncertain future after withdrawing from the Open because of chronic wrist soreness.
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Serb Djokovic said he had been unable to train because of "little bit with the flu and stomach."
"But I carried that already from the Middle East a little bit. But now it's good. It's passed."
Djokovic certainly struck the ball with impressive precision and depth on Rod Laver Arena where he traded shots with fellow Serb Viktor Troicki.
But his body language was not as positive on Margaret Court Arena an hour earlier, prompting fears the baseliner was struggling with injury as well as sickness.
Djokovic cancelled training on Saturday as well as a scheduled pre-tournament interview.
A spokesman for the International Tennis Federation confirmed Djokovic "was not well" on Saturday.
Seeking his fourth Norman Brookes Challenge Cup in five years. Djokovic has endured a rugged start to the season.
Novak Djokovic talks with his coach Boris Becker after taking a time-out from training. Source: AP
He withdrew from the final of an Abu Dhabi exhibition, citing a virus, and then lost to Ivo Karlovic in Doha.
Speaking in Doha at the Qatar ExxonMobil Open, he said the infection was the result of a hectic six months which included marriage to long-term partner Jelena Ristic and the birth of the couple's first child, Stefan.
Djokovic will face Slovenian qualifier Aljaz Bedene in the first round.
It is likely Djokovic requested a Tuesday start, leading officials to schedule the bottom half of the draw for today and the top half tomorrow to give the world champion more time to recover.
De Potro said he did not want to jeopardise his long-term future by contesting the Open.
"I don't want to put in risk again my body and my wrist. I want to play healthy." he said yesterday.
Boris Becker drills home a point to Novak Djokvic during practise on Rod Laver Arena. Source: News Corp Australia
"I can practise and train. But if I couldn't hit backhands like I want, it's not helping a lot for my game. If I do that, could be a risk for my mind, for my body, for everything.
"Now is time to stop and see the doctor again and make a good plan for the future. I really want to play tennis as soon I can. I will do everything to do it.
"I'm still very positive."
The 2009 US Open champion has been plagued by wrist problems for much of the past five years.
He returned from a 10-month lay-off at the Sydney International last week, losing to eventual runner-up Mikhail Kukushkin after posting two impressive wins.
Del Potro was scheduled to face Poland's Wimbledon semi-finalist Jerzy Janowicz in the first round.
Janowicz will now play Japanese lucky loser Hiroki Moriya.
DAY 1 AT MELBOURNE PARK
BEST ON SHOW
1. Federico Delbonis (Arg) v Nick Kyrgios (Aus)
MARGARET COURT ARENA (NIGHT)
After his breakout performances last year, all eyes will be on the 19-year-old Aussie to see what he can deliver at his home grand slam.
2. Yen-Hsun Lu (Tpe) v 2-Roger Federer (Sui)
ROD LAVER ARENA (NIGHT)
Chasing a fifth Australian Open crown, the Swiss master says his weapons are as strong as ever, which means bad news for his opponents, but equals eminently watchable tennis.
3. Petra Martic (Cro) v 2-Maria Sharapova (Rus)
ROD LAVER ARENA (NIGHT)
Sharapova is chasing her first Australian Open crown since 2008, but has started 2015 with form on her side after winning the singles title in Brisbane.
4. Thanasi Kokkinakis (Aus) v 11-Ernests Gulbis (Lat)
SHOW COURT 3
Aussie watch No.2. The other half of the 'Special Ks' will be hoping to make the most of his Open wildcard, but faces a tough first-round draw against the No.11 seed.
5. 7-Eugenie Bouchard (Can) v Anna-Lena Friedsam (Ger)
With the 'Genie Army' behind her, Bouchard has quickly emerged as a crowd favourite at Melbourne Park and is striving to improve on her semi-final run here last year.
- REBECCA WILLIAMS
THE FORECAST
MAX 24C
Cloud clearing to a mainly sunny afternoon
Other Aussies in action today
Bernard Tomic v Tobias Kamke (Ger)
Marinko Matosevic v Alexander Kudryavtsev (Rus)
Sam Groth v Filip Krajinovic (Srb)
James Duckworth v Blaz Kavcic (Slo)
Thanasi Kokkinakis v 11-Ernests Gulbis (Lat)
Luke Saville v Tim Smyczek (USA)
John Millman v 26-Leonardo Mayer (Arg)
Jordan Thompson v Joao Sousa (Por)
Jarmila Gajdosova v Alexandra Dulgheru (Rom)
Storm Sanders v Klara Koukalova (Cze)
Daria Gavrilova v Kiki Bertens (Ned)
Arina Rodionova v Monica Puig (Rom)