The American is recovering from a knee injury.
After ending her 2018 season early, the Czech took a trip to New York City.
The American turned 22 earlier this month.
The Czech had issues with her immune system earlier this year.
The young American injured his knee during Wimbledon.
The Czech is playing Coupe Banque Nationale next week.
The 21-year-old American is recovering from knee injury since pulling out of the US Open.
The 21-year-old American withdrew from the US Open with knee injury.
The Czech reached the fourth round of the US Open last year.
The American withdrew from the Cincinnati Masters last week after aggravating the injury.
Team Bucie retired in the Cincinnati after Bethanie Mattek-Sands got injured.
The American aggravated the injury in Toronto.
It took the Czech two days to travel from Vienna to Montreal.
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