Organizers of the St. Petersburg Open said Querrey and his wife tested positive the day before play started. Officials call it a "serious breach of protocol."
The victory gives Nadal a record-equalling 20th Grand Slam title.
The U.S. Open winner wore masks to highlight victims of police brutality throughout the tournament.
Over the course of her US Open run, the tennis star strategically used her masks to highlight victims of police brutality.
The ESPN analyst turned the tennis star's mask tribute for brutality victims into a red carpet-style fashion exchange.
The tennis star gutted out a three-set victory over Tsvetana Pironkova in the quarterfinal and a 24-hit rally helped her get there.
The tennis champion has been wearing masks throughout the tournament honoring victims of police brutality and racial inequality in an effort to raise awareness.
Djokovic inadvertently hit the judge in reaction to losing a point to Pablo Carreno Busta.
The tennis champion couldn’t have asked for a more adorable cheering section.
"I’m aware that tennis is watched all over the world, and maybe there is someone that doesn’t know Breonna Taylor’s story," Osaka said.