Past and present members of the Top 10 for Japan, Argentina and Russia will clash.

Players—including Victoria Azarenka, Kei Nishikori, Sloane Stephens and Angelique Kerber—who entered Australia on flights QR7493 from Los Angeles and EY8004 from Abu Dhabi, will be forced to self-isolate for 14 days after PCR results from passengers.

The two players were in "close and prolonged contact" with a non-player—reported to be Pella's physio, Juan Manuel Galvan—who, per the tournament, "tested positive for COVID-19 within the Western & Southern Open and US Open controlled environment."

ATP world No. 8 Matteo Berrettini and No. 35 Guido Pella are among those who think it's a good idea, but have declined in favor of supporting other initiatives.

The top two seeds emerged victorious in a pair of all-Argentine matchups at the ATP 250 event to win their Thursday-scheduled openers.

The red-hot Alison Riske is an unexpected underdog against Julia Goerges, while Fognini should capitalize against Guido Pella.

In front of an ignited home crowd, Team Australia prevailed against Great Britain in an epic tiebreaker. In less dramatic fashion, Russia won both singles matches to clinch against Argentina.

For the first time this century, each of the final eight have won a clay-court title.