7月21日，美网组委会公布今年参赛名单，德约科维奇榜上有名。但主办方美国网球协会随即解释称，名单只是按照世界排名生成，美网方面会严格执行美国政府的入境规定。这意味着德约如果不打新冠疫苗无法入境美国，也无法参加美网大赛。    WASHINGTON -- The Supreme Court on Monday ordered two internet sellers of gun parts to comply with a Biden administration regulation aimed at ghost guns, firearms that are difficult to trace because they lack serial numbers.The court had intervened once before, by a 5-4 vote in August, to keep the regulation in effect after it had been invalidated by a lower court. No justice dissented publicly from Monday's order, which followed a ruling from a federal judge in Texas that exempted the two companies, Blackhawk Manufacturing Group and Defense Distributed, from having to abide by the regulation of ghost gun kits.Other makers of gun parts also had been seeking similar court orders, the administration told the Supreme Court in a filing.“Absent relief from this Court, therefore, untraceable ghost guns will remain widely available to anyone with a computer and a credit card — no background check required,” Solicitor General Elizabeth Prelogar, the administration's top Supreme Court lawyer, wrote. The regulation changed the definition of a firearm under federal law to include unfinished parts, like the frame of a handgun or the receiver of a long gun, so they can be tracked more easily. Those parts must be licensed and include serial numbers. Manufacturers must also run background checks before a sale — as they do with other commercially made firearms. The requirement applies regardless of how the firearm was made, meaning it includes ghost guns made from individual parts or kits or by 3D printers.The regulation will be in effect while the administration appeals the judge's ruling to the 5th U.S. Circuit Court of Appeals in New Orleans — and potentially the Supreme Court.。美国网球协会表示，这份参赛名单包括了截止到7月18日，根据WTA和ATP排名符合资格的所有球员。根据国际网球组织的大满贯参赛规则，大满贯赛事开始前42天符合资格的选手，根据排名自动进入男单和女单的抽签区。另一方面，美国网球协会强调，如果德约想参加美网，首先要入境美国，这意味着他必须接种疫苗。美网将尊重美国政府的立场，没有接种疫苗的非美国人将无法入境。此外，作为美网硬地赛季重要一站，在加拿大举行的罗杰斯杯大师赛主办方也对德约参赛说不。

B | 赛事主管拉皮埃尔证实，入境加拿大需要接种疫苗。而加拿大政府不会为了球员改变规则。此前加拿大卫生部长已经表示，不会为德约改变规则，“规则适用于所有人，即使有例外，也是有限度的例外，更何况疫情还没有结束。

C | 再说一次，我们需要让加拿大人意识到接种疫苗的重要性。” 目前男单世界第一德约能否参加美网已经引发广泛讨论。

D | 支持者游说美国多位参议员为德约出头，网络上还发起了请愿活动，已经有12000人签名，希望美国政府允许德约参赛。但从目前情况看，德约科维奇也许只能向美网硬地赛季告别了。文/本报记者 褚鹏