A simple gesture on a TV camera has ignited one of the Australian Open’s most heated debates, with Ukrainian star Elina Svitolina once again drawing the war in her homeland into the sporting spotlight.

MELBOURNE, Australia—The post-match tradition of signing the camera lens has taken on a life of its own in recent years, with players deviating from the standard signature to scribbling inside jokes, messages of support, or even just a dot.

Ben Shelton defeated Valentin Vacherot 6-4, 6-4, 7-6(5) to reach the fourth round of the Australian Open, where the American will face Casper Ruud on Monday for a place in the quarterfinals