World number two Novak Djokovic settled an old score with a childhood rival when he beat Slovenian Blaz Kavcic 6-3, 6-2 on Friday to reach the Serbia Open semi-finals.
Somdev Devvarman missed out on a chance of featuring in his second successive Grand Slam singles main draw after losing the third and final round of the Australian Open qualifying event in straight sets to 12th seed Blaz Kavcic.
Federer looked more relieved than overjoyed when Tiafoe's forehand found the net on match point to keep his hopes of a 20th grand slam title alive.
'It was exciting and this is why I came to New York, to go through these emotions'
Glancing up at the legends of tennis can make 17-times Grand Slam champion Roger Federer push too hard for the "wow" factor, so new coach Stefan Edberg can expect a cold shoulder from the cool Swiss when watching from the stands.
Fifth seed Juan Martin Del Potro, whose match was shunted back to the late evening by the disruptions, was the first major casualty of the men's draw when he lostto 62nd ranked Spaniard Roberto Bautista at the Australian Open.
