Rules governing seeding means only one of world’s top two players can reach final
Spaniard knocked out of Australian Open as Berdych ends record 17-match losing streak
Scot sees off Gregor Dimitrov in four sets to set up tie with home favourite Nick Kyrgios
American allowed Rafa Nadal to repeat a first serve when serving for the match in Australian Open match
World number 112 Tim Smyczek takes an injured and ailing Nadal to fifth set tie-break
Federer made to work for second round place while Sharapova survives major scare
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