Bernard Tomic was sent packing early at the US Open and his minimal earnings were offset by a $US10,000 ($13,300) fine levied on him for a crude on-court outburst he directed at a heckler during his first-round loss.

The Australian, angered by a heckler in the stands during his upset loss to world number 72 Damir Dzumhur on Tuesday, was caught on camera directing a number of sexually explicit comments toward someone in the crowd.

Tomic told his taunter to "suck my balls".

"I will put my balls in your mouth" and "I will give you some money to make you feel good," Tomic added in separate exchanges which were captured by microphones on the Old Grandstand court at Flushing Meadows.

Tomic later said he snapped after being abused by the fan as well as other spectators who he claimed sledged him in his mother tongue.

Tomic, who apologised for his comments, was the 17th seed at the year's final grand slam and will receive $57,300 for his first-round appearance.

His fine was the heaviest so far at the championships, where 15 infractions were punished by tournament officials with fines totalling $46,330 through the first three days of main-draw competition.

Offenses ranged from racket abuse to audible obscenity to coaching infractions and unsportsmanlike conduct.

Proceeds from fines at the grand slams go to the Grand Slam Development Fund, which helps support the International Tennis Federation tournament program.

Last year, some $265,000 in fines were collected.

Reuters