New Delhi, Jan. 28 -- Coco Gauff has reignited debate over player privacy at the Australian Open after television cameras captured her smashing a racquet in a restricted corridor following a shock quarter-final defeat, an incident that could leave the world No.3 facing a fine of up to $50,000.

The American star's frustration spilled over after a stunning straight-sets loss to Elina Svitolina, who dismantled Gauff 6-1 6-2 on Tuesday night in one of the tournament's most unexpected results. While Gauff remained largely composed on court, her emotions surfaced out of public view - or so she believed.

Broadcast footage showed Coco Gauff repeatedly smashing her racquet on the ground in a backstage corridor reserved for players and officials....