By the numbers: Halep's tough route to final, Federer's easy semiRoger Federer has yet to drop a set through five matches at this year's Aussie Open. AP Photo/Vincent ThianManoj Bhagavatula, ESPNJan 26, 2018, 09:07 AMEmailPrintFrom Simona Halep's tough route to the final to Roger Federer's easy one, here are some of the notable numbers from the semifinals of the Australian Open:
