Thursday, 18 January 2018:
The brother of Australian star Nick Kyrgios can expect to be issued a "please explain" from Tennis Australia for donning loud T-shirts advertising a rival bookie to its sponsoring betting company.
Across the Australian's first two wins at Melbourne Park, older brother Christos Kyrgios has appeared in the player's box wearing a bright blue shirt emblazoned with slogans and the Sportsbet logo.
The shirts have been shown on the Seven Network telecast from 7pm - last year new laws made it illegal for betting ads to be aired before 8.30pm.
Australian Open organisers are still finalising their position on Christos' shirts after being taken by surprise, tournament boss Craig Tiley said.
"He's entitled to wear what he wants to wear," Tiley told 3AW on Thursday.
"Is it ideal to wear that form of overt marketing like that? No.
"We're yet to have the conversation, this happened of course during the match last night."
The tournament director said Tennis Australia produces the coverage with global broadcaster services, including the Seven Network, choosing the images to put to air.
"That we can't control. And ultimately that becomes the decision of the broadcaster," Mr Tiley said.
"I don't know how difficult it is (to pick certain shots) to do or not.
"That's why ... we will be organising to have a conversation about this moving forward."
UK bookmaker William Hill has been the grand slam's official betting partner since 2015.
During the 17th-seeded Aussie's three-set win on Wednesday, Christos had "Chill Bro" printed across his chest and in Monday's game "Nick Nick Boom".
Victoria's acting premier James Merlino noticed the T-shirt while watching the telecast with his children and said it left a "sour taste" in his mouth.
"I'm not sure there is anything that can be done about that but I personally didn't like it," Mr Merlino told reporters on Thursday.
However, Christos will reportedly donate the controversial T-shirt earnings to his brother's NK Foundation, a charity devoted to offering sporting chances to underprivileged youth.
Sportsbet declined to comment when approached by AAP.
