Katerina Siniakova stopped Coco Gauff in her tracks at the Qatar Open as Ons Jabeur and Maria Sakkari also suffered defeats
Linda Noskova
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Iga Swiatek, the world No 1, was stunned by Czech teenager Linda Noskova in three dramatic sets at Melbourne Park
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Novak Djokovic fought back from the brink against Sebastian Korda in Adelaide to preserve his four-year unbeaten run in Australia