Top seed Novak Djokovic battled into an 11th Australian Open semi-final and a record-extending 48th at Grand Slams on Tuesday, but a rampant Aryna Sabalenka had a much easier ride. 

The Serbian superstar came through a probing test on Rod Laver Arena against 12th-seeded American Taylor Fritz 7-6 (7/3), 4-6, 6-2, 6-3 to keep his bid for an unprecedented 25th major crown on track.