Jessica Pegula upsets Elina Svitolina at Australian Open

The Bills' social account cheers on the daughter of owners Terry and Kim Pegula

Jessica Pegula is one of the best stories happening at the 2021 Australian Open.

The unseeded 26-year-old American advanced to the women's quarterfinals on Sunday after defeating No. 5 seed Elina Svitolina in a 6-4, 3-6, 6-3 victory.

Pegula, whose parents Kim and Terry Pegula own the Buffalo Bills and Sabres, rallied from a 30-0 deficit after a second set loss to secure the win.

Afterward, she was getting some love from the Bills' Twitter account after her big win.

Pegula had never advanced beyond the third round of a Grand Slam before, with here only tour win coming at the Citi Open championship in 2019.

But Pegula has now won four straight matches in Melbourne, with upset victories over Svitolina and two-time champion Victoria Azarenka.

Pegula will face fellow American Jennifer Brady, ranked 22nd-overall, in the quarterfinals.

Pegula, Brady and Serena Williams are among the three Americans to reach the quarterfinals. Shelby Rogers could join them Monday if she defeats No. 1 seed Ashleigh Barty.

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