Sam Querrey has pulled out of St. Petersburg after testing positive for COVID-19.
Querrey was scheduled to play doubles alongside compatriot Tennys Sandgren in a doubles match tomorrow.
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The 49th-ranked Querrey squandered a two-set lead losing to Andrey Rublev in the French Open first-round last month.
After that loss, Querrey conceded he didn't feel fully safe in Paris with his wife and their son.
"As far as travel with my son, no, I'm comfortable with it, my wife's comfortable with it," Querrey said. "It's not fun being in the bubble, you're here in Paris but you're not in Paris, you're at the courts and you're in your small European hotel room with a ton of bags.
"So to make like a true bubble I feel like whether it's the US Open or this, I feel like you would need a hotel with 10,000 rooms because then you would need the staff of everyone, every employee, every worker, anyone that's on site coming in contact with a player whether a chef or whatever, cleaning crew, you need the MGM Grand.
"So it's actually impossible I think to make a true 100 percent bubble where no one can come in and out. Having said that they're doing a great job here, they did a great job at the US Open."
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