Tournament officials issue an `` extreme heat policy '' after temperatures top 40 Celsius . The move suspends current matches at the end of the set being played . Hide Caption 1 of 8 Photos: The Australian Bureau of Meteorology forecasts maximum temperatures in Melbourne of 44 degrees Celsius ( 111 degrees Fahrenheit ) for Thursday and Friday . The heat has already affected some players in matches this week .
Tournament officials issue an `` extreme heat policy '' after temperatures top 40 Celsius . The move suspends current matches at the end of the set being played . Hide Caption 1 of 8 Photos: The heat has already affected some players in matches this week .