Djokovic steps up record hunt as Melbourne mercury soars

Novak Djokovic will hope to take another step towards a record 25th Grand Slam title on Saturday when he plays in the Australian Open third round, with the Melbourne tournament braced for 40-degree temperatures. The Serbian great faces 75th-ranked Dutchman Botic Van de Zandschulp for a place in the last 16, while reigning champions Jannik