Taking a set from world No.1 Jannik Sinner in his Rod Laver Arena debut at the Australian Open, Tristan Schoolkate

Danielle Collins was greeted with loud boos as she stepped onto Rod Laver Arena for her third-round match against Madison Keys at the Australian Open. This reaction was expected after her behavior during her second-round match.

Danielle Collins of the U.S. reacts after defeating Destanee Aiava of Australia in their second round match at the Australian Open tennis championship in Melbourne, Australia, Thursday ...