World No.1 Iga Swiatek was upset by American Madison Keys while top-ranked Daniil Medvedev advanced to the quarter-finals of the Cincinnati Masters quarter-finals in the women’s and men;s categories respectively on Thursday. 

Poland’s Swiatek lost 6-3, 6-4 to 2019 Keys, who needed five match points to finish off the shock triumph. Unseeded Keys was thrilled with her win. “I had a couple of games with a couple of match points. She beat me pretty badly last time so I’m happy to get the win,” said Keys.