Tennis Australia has banned Russian and Belarusian flags at the Australian Open tournament, after a Russian flag was seen courtside on Monday.
Fans hung up the flag on court 14 when viewing the first-round match between Ukraine's Kateryna Baindl and Russia's Kamilla Rakhimova.
Ukraine's ambassador to Australia, Vasyl Myroshnychenko shared his frustrations at the fan's act, releasing a tweet.
"I strongly condemn the public display of the Russian flag during the game of the Ukrainian tennis player Kateryna Baindl at the Australian Open today," he said.