Novak Djokovic kept his bid of a record 25th grand slam title alive as he battled injury and fought from a set down to defeat young rival Carlos Alcaraz and win an epic Australian Open quarter-final 4-6 6-4 6-3 6-4.
Djokovic backed up his sensational victory over the 21-year-old Alcaraz in the Olympics final with a remarkable comeback in Melbourne, with the 37-year-old having struggled with his left leg in the early stages of the match.
