MELBOURNE, Australia -- Jessica Pegula's first victory over a Top 10 opponent earned the 26-year-old American her first trip to the quarterfinals of a Grand Slam tournament.
The 61st-ranked Pegula, whose parents own Buffalo's NFL and NHL franchises, held on to beat No. 5 seed Elina Svitolina of Ukraine 6-4, 3-6, 6-3 in Rod Laver Arena on Monday (Sunday night EST).
Pegula is on quite a breakthrough run. She has won four matches at Melbourne Park over the past week -- including victories over two-time Australian Open champion Victoria Azarenka and 2011 U.