Qatar, Coco Gauff and Marta Kostyuk

At the 90-year-old Zavallivsky Graphite Mine in central Ukraine, CEO Ostap Kostyuk dreams of making graphite pure enough to ...
Marta Kostyuk took advantage of Coco Gauff’s uneven performance Tuesday in Doha to capture her biggest hard-court win to date.
The victory set up Kostyuk a third-round meeting against Magda Linette who overcame Magdalena Frech with a 7-5, 5-7, 6-4 in ...
American Amanda Anisimova outlasted Ukrainian Marta Kostyuk in a very physical, high-quality three-set quarterfinal at the ...
Ekaterina Alexandrova equalled her career-best winning streak and reached her third WTA 1000 semifinal with a three-set ...
Iga Swiatek defeated Elena Rybakina to advance to the Qatar Open semi-finals, despite Rybakina's early challenge. Swiatek ...