America's Jessica Pegula advanced into her 2nd straight quarterfinals after beating 5th seed Maria Sakkari in the 4th round of the Australian Open on Sunday.
The 21st seed who dominated throughout the game ousted the Greek player in straight sets of 6-3, 6-3.
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Meanwhile, Czech Tennis player Barbora Krejcikova and Madison Keys are set to face each other in the next clash after they booked their berth for the Australian Open quarter-finals on Sunday.
While Krejicikova easily took down an injured 2 time Grand Slam Champion Victoria Azarenka 6-2, 6-2, the unseeded American player, Keys defeated 8th seed Paola Badosa of Spain 6-3, 6-1.