AMERICAN SUCCESSES ON DAY FOUR
 Madison Keys crushed Ekaterina Alexandrova: 6-0, 6-1.
Bernarda Pera continues her Cinderella run at the 2018 Australian Open; she got the biggest win of her career when she upset  Johanna Konta in straight sets: 6-4, 7-5.
Lauren Davis had another miraculous recovery; after dropping the first set to Andrea Petkovic, she dished out two bagels in the next two sets to win in three: 4-6, 6-0, 6-0.
Jennifer Brady/Vania King have teamed up down under and they defeated Gavrilova/Kasatkina: 6-4, 6-1.
Tennys Sandgren defeated  Stan Wawrinka in straight sets for the biggest upset of his career: 6-2, 6-1, 6-4. This is Wawrinka’s first tournament since knee surgery last year and he was simply not match tough and Sandgren took advantage of the opportunity to get to his first major third round.
FALLEN SEEDS DOWN UNDER
How does the number three seed, Garbine Muguruza, lose to the 82nd ranked player, Su-Wei Hsieh? Too many unforced errors from the Spaniard cause her demise and she is out of the Australian Open in the second round: 6-7(1), 4-6.
 Anastasija Sevastova with her injured thigh was no match for Maria Sharapova and she lost 1-6, 6-7(4).
The veteran Frenchman struck again, 36 year old Julien Benneteau upended  David Goffin in four sets: 1-6, 7-6(5), 6-1, 7-6(4).
 Mirjana Lucic-Baroni could not escape the clutches of the young Belarusian, Aliaksandra Sasnovich and she went down fairly easily in straight sets: 3-6, 1-6.
 Elena Vesnina could not handle the pace of Naomi Osaka and she went down in straight sets as well: 6-7(4), 6-2
PAINFUL LOSSES FOR THE AMERICANS
After a promising start, 7-6(6), 6-3, Denis Kudla was unable to ride that momentum to victory. There was no upset of  Dominic Thiem for the American; he lost 7-6(6), 6-3, 3-6, 2-6, 3-6. It was a painful loss for the American, who was probably too anxious after taking the lead to play as freely as he did in the first two sets.
 Sam Querrey lost in four sets to Marton Fucsovics: 4-6, 6-7(6), 6-4, 2-6.
Tim Smyczek lost to  Albert Ramos-Vinolas in three sets: 4-6, 2-6, 6-7(2)
Next Gen Finals champion, Hyeon Chung put an end to Daniil Medvedev’s hope of getting past the second round this year. The Russian will have to wait until next year as he went down in straight sets: 6-7(4), 1-6, 1-6
Our spotlight player was cruising along nicely until he hit a speed bump in the third set; however,  Alexander Zverev righted the ship and defeated fellow countryman, Peter Gojowczyk, in four sets: 6-1, 6-3, 4-6, 6-3.
SOURCE OF IMAGE: Creative Commons (Bernarda Pera)