Former US Open champion Daniil Medvedev has been handed a substantial fine for his behaviour in a extraordinary first-round exit, BBC reported.

Medvedev, 29, was knocked out of the Grand Slam tournament after a meltdown sparked by a photographer walking on to the court during his defeat by France's Benjamin Bonzi.

The former world number one has been fined almost £31,500 ($42,500) by the United States Tennis Association.

He was docked $30,000 for unsportsmanlike behaviour and another $12,500 for obliterating a racket against a chair, according to BBC.

It means the Russian will have to forfeit about 40% of the first-round prize money he received.