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."

The ATP's No. 1 dropped just five games to begin his Australian Open campaign Tuesday, while the WTA world No. 2 defeated Kristina Mladenovic.

Nadal seems to be healthy—and when he plays an unseeded opponent, that’s usually all you need to know.