The U.S. Open descended into chaos on Sunday when a photographer came onto the court as Daniil Medvedev faced match point, bringing the first-round match to a standstill and sparking a spectacular meltdown from the Russian.

Former champion Medvedev was eventually knocked out 6-3, 7-5, 6-7 (5-7), 0-6, 6-4 by Frenchman Benjamin Bonzi, who threatened to walk off the court at one point and called for the Russian to be disqualified.

Serving for the match at 6-3, 7-5, 5-4, Bonzi was preparing to play his second serve when the photographer stepped onto the court surface.