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Tennis: It's the Australian Oven as temperatures soar

Japan's Kei Nishikori cools off with an ice pack during his men's singles match against Marinko Matosevic of Australia on day two of the 2014 Australian Open tennis tournament in Melbourne on Jan 14, 2014. Top tennis stars were put through a punishin
Japan's Kei Nishikori cools off with an ice pack during his men's singles match against Marinko Matosevic of Australia on day two of the 2014 Australian Open tennis tournament in Melbourne on Jan 14, 2014. Top tennis stars were put through a punishing workout at the Australian Open as temperatures soared towards record levels and threatened to disrupt a packed schedule on day two. -- PHOTO: AFP
An official attends to a ball boy who collapsed during the men's singles match between Daniel Gimeno-Traver of Spain and Milos Raonic of Canada at the Australian Open 2014 tennis tournament in Melbourne on Jan 14, 2014. Top tennis stars were put thro
An official attends to a ball boy who collapsed during the men's singles match between Daniel Gimeno-Traver of Spain and Milos Raonic of Canada at the Australian Open 2014 tennis tournament in Melbourne on Jan 14, 2014. Top tennis stars were put through a punishing workout at the Australian Open as temperatures soared towards record levels and threatened to disrupt a packed schedule on day two. -- PHOTO: REUTERS
Caroline Wozniacki of Denmark shakes hands with Lourdes Dominguez Lino of Spain after winning their women's singles match at the Australian Open 2014 tennis tournament in Melbourne on Jan 14, 2014. Top tennis stars were put through a punishing workou
Caroline Wozniacki of Denmark shakes hands with Lourdes Dominguez Lino of Spain after winning their women's singles match at the Australian Open 2014 tennis tournament in Melbourne on Jan 14, 2014. Top tennis stars were put through a punishing workout at the Australian Open as temperatures soared towards record levels and threatened to disrupt a packed schedule on day two. -- PHOTO: REUTERS
Caroline Wozniacki of Denmark pours water over her head during her women's singles match against Lourdes Dominguez Lino of Spain at the Australian Open 2014 tennis tournament in Melbourne on Jan 14, 2014. Top tennis stars were put through a punishing
Caroline Wozniacki of Denmark pours water over her head during her women's singles match against Lourdes Dominguez Lino of Spain at the Australian Open 2014 tennis tournament in Melbourne on Jan 14, 2014. Top tennis stars were put through a punishing workout at the Australian Open as temperatures soared towards record levels and threatened to disrupt a packed schedule on day two. -- PHOTO: REUTERS
Switzerland's Roger Federer plays a shot during his men's singles match against Australia's James Duckworthon day two of the 2014 Australian Open tennis tournament in Melbourne on Jan 14, 2014. Top tennis stars were put through a punishing workout at
Switzerland's Roger Federer plays a shot during his men's singles match against Australia's James Duckworthon day two of the 2014 Australian Open tennis tournament in Melbourne on Jan 14, 2014. Top tennis stars were put through a punishing workout at the Australian Open as temperatures soared towards record levels and threatened to disrupt a packed schedule on day two. -- PHOTO: AFP
Victoria Azarenka of Belarus celebrates after victory in her women's singles match against Sweden's Johanna Larsson on day two of the 2014 Australian Open tennis tournament in Melbourne on Jan 14, 2014. Top tennis stars were put through a punishing w
Victoria Azarenka of Belarus celebrates after victory in her women's singles match against Sweden's Johanna Larsson on day two of the 2014 Australian Open tennis tournament in Melbourne on Jan 14, 2014. Top tennis stars were put through a punishing workout at the Australian Open as temperatures soared towards record levels and threatened to disrupt a packed schedule on day two. -- PHOTO: AFP

MELBOURNE (AFP) - Top tennis stars were put through a punishing workout at the Australian Open on Tuesday as temperatures soared towards record levels and threatened to disrupt a packed schedule on day two.

With the mercury hitting 35 degrees Celsius before play even started, players and fans were feeling the heat at Melbourne Park where 64 matches were on the agenda.

Defending women's champion Victoria Azarenka and Caroline Wozniacki, both on court at 11.00am (8am Singapore time) for their round one matches, grimaced and sweated in the bright sun and draped themselves in ice packs during changeovers.

Australia heatwave

Authorities on Tuesday warned of extreme fire danger in the next few days.

Adapted from AFP

Swiss great Roger Federer will follow Azarenka onto the centre court when he faces Australia's James Duckworth in what are likely to be the day's hottest temperatures.

"Geez, it feels hot out there," said Wozniacki after her win over Lourdes Dominguez Lino. "It feels like I was sweating in a sauna or something.

"It's really tough... I was just trying to take the ice towel as much as I could and try not to think about the heat, like I'm in Alaska or something."

Officials are keeping a close eye on the heat and humidity - and for signs of exhaustion among players - as they weigh up whether to call off play and close the roofs on the centre and second court.

Temperatures are forecast to hit 43 degrees Celsius on Tuesday, shy of Melbourne's January record of 45.6 Celsius during the notorious Black Friday bushfires of 1936.

High temperatures are expected to remain for most of the week, in similar conditions to the 2009 Black Saturday bushfire disaster which killed 173 and injured hundreds more.

Emergency officials announced a blanket fire ban across Victoria and warned of extreme temperatures in parts of the state.

At Melbourne Park, the tennis venue near the centre of the state capital, unshaded seating areas lay largely empty as fans stayed out of the sun.

Volunteers handed out sunscreen as spectators entered the venue wearing sombreros, umbrella hats and sunglasses, and a young girl frolicked in a fountain to stay cool.

The Australian Open is no stranger to extreme heat with many incidences in the past, but few occasions when play has been suspended.

In 2009, the hottest Australian Open on record with an average daily temperature of 34.7 degrees Celsius, defending champion Novak Djokovic pulled out of his quarter-final with Andy Roddick, citing heat exhaustion.

By 12.30pm (8.30pm Singapore time), the official temperature was given as 38.2 degrees Celsius.