Brief stories from day five of the Australian Open on Friday.

- CoCo in more hot water -

CoCo Vandeweghe was on Friday slapped with the largest fine at the Australian Open so far for her expletive-laden outburst directed at her conqueror Timea Babos in the first round.

As the 10th seed was dumped out at the first hurdle Monday, she also at one stage copped a code violation for delaying play to eat a banana.

Organizers fined her US$10,000 for unsportsmanlike conduct for the verbals, which were followed immediately by the slamming of the fiery American's racquet into the court.

Her going bananas, however, went without further sanction.

- Anti-social media riles Dasha -

Daria Gavrilova is the darling of the local crowd at Melbourne Park, but some online Aussie punters took vitriolic exception when she blew a 5-0 first set lead in the early hours of Thursday morning to lose her second-round match.

"Dasha" became the victim of some unpleasant trolls who had lost money as a result and took it upon themselves to fire unprintable abuse across her social media channels.

It was so bad she had to change her Instagram privacy settings.

"Thanks everyone who keeps supporting me and for all your sweet messages!" Gavrilova posted on Instagram late Thursday.

"Shhh to all the betting people ... I copped it hard last night. Only people I follow can comment on my posts now ... so my family doesn't see all the 'love' I get".

- Hot and cold comfort -

Melbourne is well known for its weather extremes. But both ends of the scale in one day?

Friday carried on where Thursday left off with sweltering heat and thermometers hitting 40 Celsius in the shade by 2 p.m. local time.

Some players suffered in the kiln-like conditions, some complained it was unfair even to play and Roger Federer said that everyone should just get on with it.

Then, suddenly a cold front swept through in the afternoon and the mercury began to plummet, visibly, to the joy of players, spectators and staff at the sprawling Australian Open venue.

By 6 p.m. thermometers had tumbled to 28 degrees and by just after sunset at 9 p.m. it was a positively chilly 24 degrees -- an incredible drop of 16 degrees in 7 hours.

For more sports coverage, visit the ABS-CBN Sports website.