MELBOURNE, Jan 28 - Novak Djokovic's quest for a record Grand Slam title continued in dramatic circumstances after fifth seed Lorenzo Musetti quit their Australian Open quarter-final match with an injury after taking a two-set lead at Melbourne Park on Wednesday.

Musetti's retirement when leading 6-4 6-3 1-3 meant Djokovic pulled off a great escape at his most successful hunting ground, with the 10-times champion's bid for a standalone 25th major to break the tie with Margaret Court still alive.