TENNIS: Nick Kyrgios has been fined $3765 for unsportsmanlike conduct in the fall-out to his comfortable opening-round Australian Open victory.

The Aussie was among six players fined a total $19,450 for indiscretions in qualifying and the main draw's first phase.

Kyrgios was heard telling a rowdy spectator to "shut the f*** up” during a 6-1 6-2 6-4 rout of Brazilian Rogerio Dutra Silva.

Croat Borna Coric tops the fines bulletin with a $6274 penalty for racquet abuse during his defeat to Queenslander John Millman.

Argentina's Diego Schwartzman and Romanian Marius Copil were fined $2500 each for the same offence.

Kazakh Alexander Bublik was hit with two $1254 fines for audible obscenities during qualifying.

American Stefan Kozlov was penalised the same amount for an audible obscenity in first-round qualifying.

Officials are continuing to adjudicate CoCo Vandeweghe's two code of conduct violations from her troubled first-round defeat.

The volatile American was accused of mouthing obscenities in the direction opponent Timea Babos.