Iga Swiatek romped to an emphatic victory in her season-opening match at the United Cup Monday, but Stefanos Tsitsipas crashed as Kazakhstan upset Greece to make the knockout round of the mixed-team tournament. 

Five-time Grand Slam winner Swiatek was on court for the first time since news broke in late November that she served a one-month ban for a doping violation. But the Pole quickly shook off any nerves in Sydney with a 6-1, 6-0 thrashing of Norway’s Malene Helgo, needing just 62 minutes for the demolition job. “Pleased with everything, honestly. I’m happy for sure with the performance,” said the World No. 2.