Australian Open finalist Danielle Collins is one of several notable Americans in action on Day 1 in Melbourne.
"I feel a bit emotional right now, to be honest," Novak Djokovic said of his reception from Rod Laver Arena fans.
Reigning Australian Open doubles champion Barbora Krejcikova sports Fila.
Brenda, 15, and Linda 17, are set to play the same Slam main draw for the first time.
Four players have a shot to finish the tournament as the ATP's No.1.
Mohamed Hassan has been banned for life and Houria Boukholda was banned for two years.
The organization named starts Ons Jabeur, Hubert Hurkacz and others to its newly formed committee.
