Novak Djokovic was at the centre of another Australian Open row on Monday while Jannik Sinner needed medical attention in fierce heat to battle into the quarter-finals and Iga Swiatek won easily.Djokovic has been at the centre of controversy before at the Australian Open,

Novak Djokovic was at the centre of another Australian Open row on Monday while Iga Swiatek will be desperate to avoid a major shock and Jannik Sinner is also eyeing