London - Nick Kyrgios has been fined £13 190 (R235 000) after the controversial Australian was caught on camera making an obscene gesture involving a water bottle at Queen's Club.

Kyrgios is back in hot water after he was seen performing an imitation of a lewd act at the change of ends during his Queen's semi-final loss to Marin Cilic on Saturday.

The 23-year-old has been handed a hefty sanction by the ATP Tour for "inappropriate behaviour".

Kyrgios - who has been dogged by accusations of tanking in the past - had already been in trouble earlier in the week during his Queen's win over Britain's Kyle Edmund.

The BBC was forced to apologise to viewers after a string of Kyrgios expletives were audible on air.

Asked if he was concerned that the BBC had to issue an apology for his behaviour, Kyrgios said he "didn't care".