Chasing dawn, high-drama second round wraps at Australian Open

(Photo credit: Danielle Parhizkaran-USA TODAY Sports)
Dawn threatened at the end of Australian Open men's singles action Thursday, a marathon session traced with high drama and fifth-set tiebreakers as Day 5 jumped into Day 6 at Melbourne.

When play finally ended for the day at 3:39 a.m. local time Friday in the third-latest finish to a match in majors history, Russian third-seed Daniil Medvedev celebrated a five-set com