帮原po补上英文新闻来源两个，以免被认为是不明来源。
一个是CBSsports（美国三大无线台底下的），一个是富比世。
https://www.cbssports.com/tennis/news/novak-djokovic-may-play-in-us-open-if-officials-waive-quarantine-period/
"According to a report from Spanish newspaper Marca, the No. 1 men's tennis
player in the world plans to play in the US Open in New York if tournament
officials agree to waive the quarantine requirement once he returns to
Europe. "
“根据西班牙报纸Marca，如果赛事官员同意免除他从美国返回欧洲的隔离规定，
那么男子世界第一计画要参加纽约举行的美网。”
https://www.forbes.com/sites/adamzagoria/2020/07/15/novak-djokovic-practices-on-hard-courts-hints-he-will-play-us-open/#c607551739ef
"According to a report in Marca, Djokovic is willing to play the Open only if
officials agree to waive the quarantine requirement upon returning to Europe.
Djokovic is apparently hoping to play the French Open warm-up tournaments in
Madrid and Rome in the two weeks after the U.S. Open and before the French."
“根据Marca的一篇报导，Djokovic只在官员同意免除他从美国返回欧洲的隔离规定时，
才会愿意参加美网。Djokovic显然希望参加在马德里和罗马举办的法网热身赛，这两项
赛事是在美网后与法网前之间的两周举行。”
这两篇都提到了西班牙文的报纸 Marca作为消息来源
我不识西班牙文，但连结如下
https://www.marca.com/tenis/2020/07/15/5f0ec154ca474113058b466b.html
从上下文看起来，Djokovic要求的可能不是美网的官员，而是欧洲赛事的官员，
因为提到的是从美国返欧以后的隔离要求。