Clinical Swiatek romps as Tsitsipas crashes at United Cup

Poland’s Iga Swiatek in action. —AFP/FilePERTH: 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…