The incident happened ahead of Djokovic's Davis Cup match against Cameron Norrie.
Djokovic lost to home bet Jannik Sinner in front of an enthusiastic crowd at Pala Alpitour.
Novak Djokovic is chasing a record-extending 24th Grand Slam.
The Russian looked visibly drained as he played in the hot and humid conditions at Flushing Meadows.
The world number one had to fight hard to overcome Nicolas Jarry in the third round.
The environmental activists have also caused disruptions in the ongoing Ashes series between England and Australia.
The Princess of Wales and the tennis legend played a friendly match ahead of the Grand Slam.
Questions are being asked about the possibility of replacing humans during the event coverage.
Two of Murray's children are still under the age limit and will not be allowed to sit in the stands at Wimbledon.
Alcaraz won a hard-fought second set before experiencing heavy cramping in the middle of the third,
The patch was spotted while Djokovic was changing his shirt at the French Open.
The two players are the favourites to win in the absence of Rafael Nadal.
The defending champion feels that the crowd would "boo every single thing."
French Sports minister Amelie Oudea-Castera is not happy about the Serbian star's vocal stance on the conflict in Kosovo.
Rafael Nadal pulled out from the French Open and announced that he will retire next year.
Nadal said he will not set a date for his return, but said the Davis Cup in November could be a potential target.
Novak Djokovic has won 22 Grand Slam titles.
Novak Djokovic is a 22-time Grand Slam winner.
Novak Djokovic has already won 2 titles this year.
Novak Djokovic has won the Miami Open six times.
Wimbledon 2023: Ban on Russian players to be reportedly lifted, but support for Putin will get them kicked out
Novak Djokovic won the men's singles title at Wimbledon 2022.
His dominant win drew him level with Nadal on a record 22 Slams, two clear of retired Roger Federer.
Srdjan Djokovic has issued a statement after he was caught up in a controversy involving pro-Putin supporters at the 2023 Australian Open. He was posing with Russian fans after Novak's win over Rublev.
Novak Djokovic's father Srdjan was seen posing for pictures with Russian fans brandishing flags with Vladimir Putin's face and chanting slogans in support of their country's invasion of Ukraine.
Novak Djokovic was two wins away from a 22nd Grand Slam crown after bulldozing into the Australian Open semi-finals on Wednesday, while Aryna Sabalenka was equally impressive in reaching the women's last four.
Novak Djokovic is playing the 2023 Australian Open with strapping around his hamstring after suffering an injury earlier in the tournament.