oco Gauff staved off another early exit from Wimbledon by beating Argentina's Solana Sierra 6-3 3-6 7-6(10-7) with a tiebreak turnaround to reach the third round on Wednesday.
French Open runner-up Maja Chwalinska crashed out of Wimbledon in the opening round following a 2-6, 7-5, 6-2 loss to Thai qualifier Mananchaya Sawangkaew on Monday after the Pole fell and hurt herself while on match point.
India's Karman Kaur Thandi has clinched her second W60 ITF title of her career after winning at the Evansville event in the USA.
IMAGES from the Australian Open matches played at Melbourne Park in Melbourne on Thursday.
With the players then facing a quick turnaround ahead of the Indian Wells main draw beginning on Wednesday, Pegula offered to fly all of them to California for the WTA 1000 tournament.
World number two Gauff clawed her way back from a set down to defeat Russian Veronika Kudermetova 4-6, 7-5, 6-2 in a match that stretched over two and a half hours.
Michelsen, seeded 26th, will face hard-hitting 11th seed Karen Khachanov of Russia, who upset eighth seed Casper Ruud in their fourth round match 6-4, 7-5.
Pain free Vondrousova getting old magic back on grass
French Open champion Gauff is in line for a clash with fellow American Jessica Pegula.
Fritz, Shelton lead American charge at US Open with first-round wins
Madison Keys was dumped out of the Miami Open third round on Sunday, falling 6-4, 6-2 to Philippine wild card Alexandra Eala
