Jannik Sinner, the Italian tennis superstar ranked No. 1 in the world, withdrew from the Paris Olympics Wednesday because of tonsillitis days before matches begin.

Sinner wrote on social media he was advised by a doctor to sit out the Games because of it.

"Missing the Olympics is a big disappointment, given that it was one of my main goals this season," Sinner wrote in Italian, according to The Associated Press. "I couldn’t wait to have the honor of representing my country in this extremely important event."

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The 22-year-old has put together one of the best years of his young career. He started out the tennis season with a victory at the Australian Open, the first Grand Slam title of his career. He finished in the semifinals at the French Open, the best finish of his career.

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He has 14 career singles titles.

Sinner’s absence means Novak Djokovic and Carlos Alcaraz will be the top-seeded men for the tournament, setting up a potential gold medal rematch of the Wimbledon final.

Andrea Vavassori will replace Sinner in singles. Luciano Darderi will replace Sinner in doubles. He will play with Lorenzo Musetti.

Alexander Zverev won the gold at the Olympics in 2021, defeating Russia’s Karen Khachanov. Spain’s Pablo Carreno Busta won the bronze.

The Associated Press contributed to this report.

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Anti-Israel demonstrators descended on Washington, D.C., on Wednesday ahead of Israeli Prime Minister Benjamin Netanyahu's address to Congress. 

Fox News estimates that a few hundred protesters have gathered on Pennsylvania Avenue and 3rd Street, outside the Gallery of Art. They have a stage set up in front of the Capitol building and are currently chanting.

The protest organizers include Answer Coalition and Code Pink. There have been numerous speakers from various organizations, including one from the Party for Socialism and Liberation. 

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Fox News crews witnessed numerous signs with Netanyahu’s face, labeling him a "Wanted War Criminal." 

Other slogans on signs include, "Stop the Genocide," "Stop arming Israel," and "End all US Aid." 

The crowds have chanted "Free Palestine" and "From the river to the sea…," an antisemitic phrase that calls for the elimination of the state of Israel. 

D.C. Metropolitan Police Department officers were also seen clearing anti-Israel protesters who were blocking traffic in the nation's capital on Wednesday. 

Police have taken people into custody near the U.S. Capitol, the Associated Press reported. 

A handful of people were led away by officers, while others chanted for them to be released.

More than 1,000 people gathered Wednesday morning on Pennsylvania Avenue within sight of the Capitol building, the AP reported. 

A large group of protesters marched toward the Capitol after blocking a nearby intersection and calling for a "student intifada." 

"Shut it down!" they repeatedly chanted.

"Bibi, Bibi, We’re not done! The intifada has just begun!" demonstrators shouted, referring to Netanyahu by his nickname.

Fox News' Meghan Tome and the Associated Press contributed to this report.