The 19-year-old is the 10th teenager to win the US Open women's title all-time and the first American teenager to be crowned at her home major
According to the Bild tabloid, Zverev won't be ready for the grand slam until after the Davis Cup group round, which will take place in his hometown of Hamburg from September 13 to 18.
While Swiatek will aim for her second Grand Slam title of the year after clinching the French Open title as part of an incredible 37-match winning streak, Serena, who has won 23 Grand Slam singles titles in her career.
The Serbian will not be able to play in the Grand Slam because the organisers of the tournament have once again insisted that they will respect the US government's Covid protocols.
The Serbian admits he is running out of time to travel to New York for the US Open after winning his seventh Wimbledon title and 21st Grand Slam trophy.
The 19-year-old conceded the match while down 4-3 and a break of serve in the first set, and later said "no idea" when asked whether she would be fit for the grass-court major beginning on June 27, a BBC report said.