Early within the second set of her second-round match on Thursday evening, a ball bounced simply previous Ons Jabeur’s attain, and he or she misplaced the purpose, throwing her arms up in exasperation.

On any regular day, Jabeur, the No. 5 seed, would most likely have reached the ball in time to return it down the road, however she has been enjoying whereas sick.

Jabeur, who reached the U.S. Open closing final 12 months, is amongst a number of gamers who’ve needed to deal with an sickness of some type at this 12 months’s match.

Dominic Thiem of Austria retired within the second set of his second-round match, doubled over on the web with what seemed to be a stomach-related situation. Emil Ruusuvuori withdrew from the match earlier than his first-round match, citing an unspecified sickness. Tennys Sandgren, who didn’t advance out of the qualifiers, wrote on X, previously referred to as Twitter, that he grew to become sick after returning dwelling from the match.

“I got the us open bug,” he mentioned in a separate post, including, “in a way still feels like I’m in the tournament but at home.”

It’s not simply gamers. The ESPN commentator John McEnroe said on Tuesday that he had examined optimistic for the coronavirus after feeling unwell.

It is unclear whether or not the entire gamers have the identical sickness, or whether or not their circumstances are linked, however one thing has been going across the U.S. Open.

Hubert Hurkacz appeared to wrestle throughout his second-round match on Thursday, when he was upset by Jack Draper of Britain. During the match, medical employees got here out to deal with Hurkacz for what didn’t seem like a bodily harm. Around the tennis grounds, sniffles and coughs will be heard, and a few gamers have been toting tissues of their baggage.

The string of sicknesses comes as a late-summer wave of coronavirus infections has been reported throughout the United States, with indications of an increase in circumstances within the Northeast and within the West.

Illnesses are doable at any match, the place gamers are sometimes in shut quarters and share amenities. But with gamers now not required to check for Covid-19, it’s troublesome to find out the reason for the sicknesses amongst them.

Health protocols on the U.S. Open have develop into much less stringent since 2020, when spectators were not allowed to attend the match and when gamers took to the empty courts in face masks.

When followers have been allowed to return in 2021, they have been required to point out proof of vaccination towards the coronavirus. That requirement has since been dropped, and people attending the U.S. Open this 12 months don’t want to point out proof of vaccination, present a destructive coronavirus take a look at or put on masks.

After prepared her approach — simply barely — to a first-round win, Jabeur mentioned she had the flu. In her second-round match, she appeared to wrestle once more, coughing on courtroom a number of instances, together with throughout her interview after beating the unseeded Czech participant Linda Noskova in three units.

Jabeur mentioned later in a news convention on Thursday that she had been sick for a couple of week.

“I’m taking a lot of medicine,” she mentioned, including that she “basically took every medication” the U.S. Open medical doctors have.

Jabeur mentioned her abdomen had been “fine,” however she famous that she knew different gamers had been combating abdomen points. She appeared to waver on whether or not she had the flu or one thing else.

“I think I got a flu or something,” she mentioned on Thursday evening.

It was unclear whether or not Jabeur, who performs her third-round match on Saturday towards the No. 31 seed Marie Bouzkova of the Czech Republic, had taken a coronavirus take a look at to rule out the potential of an an infection.

“I’m a zombie because I have a flu,” she mentioned.