The American beat Magdalena Frech to become the youngest player to reach the quarter-finals of the Australian Open since Radwanksa in 2008
Coco Gauff cruised past Magdalena Frech in straight sets to begin the order of play in Rod Laver Arena on Sunday afternoon.
Two-time grand slam champion Simona Halep took less than an hour to sail into the last four of her first tournament for six months.