MELBOURNE, Jan. 21 (Xinhua) -- Following are the results from the Australian Open at Melbourne Park on Sunday (prefix number denotes seeding):

Men's fourth round:

1-Rafa Nadal, Spain, bt Diego Schwartzman, Argentina, 6-3, 6-7(4), 6-3, 6-3

3-Grigor Dmitrov, Bulgaria, bt Nick Kyrgios, Australia, 7-6(3), 7-6(4), 4-6, 7-6(4)

6-Marin Cilic, Croatia, bt Pablo Carreno Busta, Spain, 6-7(2), 6-3, 7-6, 7-6(3)

Women's fourth round:

2-Caroline Wozniacki, Denmark, bt Magdalena Rybarikova, Slovakia, 6-3, 6-0

4-Elina Svitolina, Ukraine, bt Denisa Allertova, Czech Republic, 6-3, 6-0

Elise Mertens, Belgium, bt Petra Martic, Croatia, 7-6(5), 7-5

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