Djokovic cruises to win; Nishikori storms back

Kei Nishikori rallied from two sets down and won 10 straight games before Kamil Majchrzak retired with the score at 3-6, 6-7 (6), 6-0, 6-2, 3-0 to advance Nishikori on Day 2 of the Australian Open. Also advancing was fourth-seeded Alexander Zverev.