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.
“Pleased with everything, honestly. I’m happy for sure with the performance,” said the world No 2.
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“It’s not always easy to play for your country, sometimes the pressure is a bit bigger.
“I feel good, I feel happy, happy I can play tennis overall,” she added. “I’m just going step by step and we’ll see what’s next.”
The 23-year-old tested positive for the heart medication trimetazidine (TMZ) in an out-of-competition sample in August when she was ranked No 1.
However, the International Tennis Integrity Agency (ITIA) accepted that the violation was not intentional and she escaped with a one-month sanction.
While she was in electric form, Greek star Tsitsipas had a day to forget.
He is coming off a mediocre 2024 in which his ranking dropped to its current 11 from a career-high three and was hoping for a confidence-boosting fresh start in Perth.
But he was stunned 6-4, 7-6 (7/0) by 78th-ranked Alexander Shevchenko.