A protester appeared to set his arm on fire after running on court and briefly stopping play during the Laver Cup at the O2 Arena in London.
The young man, wearing a T-shirt with the message ‘No UK private jets’ on the back, was quickly removed by security and detained in an internal corridor.
It is the latest security breach at a tennis tournament following incidents at the Australian Open and French Open earlier this year.
A male protester, carrying a banner which read ‘Abolish refugee detention’, jumped on to the court during the Australian Open men’s singles final between Rafael Nadal and Daniil Medvedev in February.
In May, a female protester interrupted the French Open semi-final between Casper Ruud and Marin Cilic.
She walked on to Court Philippe Chatrier, knelt beside the net post, tied something around her neck and fastened it to the net.
In London on Friday, there was a short delay of about five minutes before the Laver Cup match resumed.
Tsitsipas, playing for Team Europe, had just won the opening set and the Greek went on to clinch a 6-2 6-1 victory.
