World number one Ashleigh Barty will make her first top-level tennis appearance in nearly a year when she joins a star-studded exhibition in Adelaide this month, organisers said on Thursday. Australia’s Barty, who has remained top of the rankings despite not playing since last February, joins a field which also includes major-winners Serena Williams, Naomi Osaka and Simona Halep. “I am looking forward to playing my first match for the 2021 season in Adelaide,” Barty said in a Tennis Australia statement.