MELBOURNE, Australia (AP) — Four people were kicked out of the Australian Open after displaying Russian flags — which have been banned from Melbourne Park — and threatening security guards, police and Tennis Australia said Thursday. A Victoria Police spokeswoman said the four have not been charged but were evicted from the site. The flags, at least one of which included an image of Vladimir Putin, were being waved during a gathering outside of Rod Laver Arena after Novak Djokovic beat Russian player Andrey Rublev in straight sets in the quarterfinals of the year’s first Grand Slam tennis tournament Wednesday…