New Delhi, Jan. 27 -- Aryna Sabalenka beat 18-year-old Iva Jovic 6-3, 6-0 to reach the semifinals of the Australian Open on Tuesday before searing heat on Day 10 forced matches to be played under cover.

Alexander Zverev got the benefit of playing under a roof at Rod Laver Arena and advanced to the final four with a 6-3, 6-7 (5), 6-1, 7-6 (3) win over 20-year-old Learner Tien. The No. 3-ranked Zverev, last year's runner-up in Australia, reached his 10th Grand Slam semifinal on the back of 24 aces and just a single double-fault - which he served when he had six match points in the deciding tiebreaker.

Top-ranked Sabalenka, also a runner-up in Melbourne last year, is aiming for her third Australian Open title in four years. She won back-to...