Nishikori advances to 2nd round; Zverev, too

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 on Day 2 of the Australian Open. Also advancing was fourth seed Alexander Zverev.