In a fourth-round showdown No.22 seed Elena Rybakina of Kazakhstan upset World No.1 Iga Swiatek of Poland to make her first Australian Open quarterfinal here at Rod Laver Arena on Sunday. Rybakina produced a sublime game, defeating World No. 1 Swiatek 6-4, 6-4 in a match which lasted for an hour and a half to make her first Australian Open quarterfinal.
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