A US OPEN photographer sparked chaos on Sunday night when he inadvertently gatecrashed Daniil Medvedev's first round match.

The Russian former world No1 was looking to kickstart his torrid season as he faced Benjamin Bonzi on Louis Armstrong Stadium.

Bonzi, who beat Medvedev in round one of Wimbledon, was serving for match point in the third set of their US Open clash.

After the Frenchman missed his first serve, a blundering snapper decided to walk on to court to try to get the perfect angle of what would have been the Frenchman's moment of victory.

This prompted fury from Medvedev, who marched straight over to umpire Greg Allensworth.

The man in the chair, who was described by American big-server Reilly Opelka as the "worst ump on tour" earlier this year, said amid a cacophony of b

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