Injury free at last, grand slam under-achiever Alexander Zverev has given himself another shot at an elusive major title by progressing to his fourth Australian Open semi-final.
Runner-up last year to Jannik Sinner, Zverev lived up to his third seeding with a hard-earned 6-3 6-7 (5-7) 6-1 7-6 (7-3) victory over rising American Learner Tien in melting Melbourne on Tuesday.
