'Big relief' for Roger Federer

*Melbourne:* Six-time champion Roger Federer said it was a "big relief" to survive an epic five-set marathon and seal his 100th Australian Open win on Friday, fending off a dogged challenge from John Millman. The Swiss master was rattled by the all-guns-blazing Australian, but scraped through 4-6, 7-6 (7/2), 6-4, 4-6, 7-6 (10/8)...