The seeds held firm today; however, there were still some mishaps.
 Karolina Muchova lost to American, Catherine Bellis.
 Nikoloz Basilashvili (GEO) lost 6-4, 6-7(5), 4-6, 4-6 to  Fernando Verdasco (ESP).
 Danielle Collins (USA) lost a tough one to the dangerous  Yulia Putintseva (KAZ). Collins was done in by the tenacity of her opponent and a poor second serve; she only won twenty-seven percent of her second serves in the third set and was unable to convert on her break point opportunities.
Pretty Good Day For Americans
 Kenin/Mattek-Sands defeated Lee/Wu 6-4, 6-3.
 John Isner defeated  Alejandro Tabilo (CHI) 6-4, 6-4, 6-3.
 Taylor Fritz had to do it the hard way.  Kevin Anderson (RSA) took the early lead two sets to love 6-4, 7-6(5); however, the American did not lose hope, he dug in his heels and fought back, taking the third set in a tiebreak 7-6(4). After that it was all Fritz as Anderson had nothing left in the tank to resist the charge of his younger opponent. Fritz won the last two sets 6-2, 6-2.
[PR44] Catherine Bellis defeated  Karolina Muchova (CZE) 6-4, 6-4.
Sandgren/Withrow defeated Demoliner/Middelkoop 4-6, 7-6(4), 7-6(8).
Johnson/Querrey defeated Hsieh/Lu 6-7(9), 6-4, 6-4.
Gauff/McNally defeated Muchova/Teichmann 6-3, 6-2.
Krawczyk/Pegula defeated Begu/Pliskova 6-3, 6-2.
Americans Upset Down Under
 Taylor Townsend will have to wait to have her break out season at the next major. The twenty-three-year-old lost in straight sets to the wily veteran,  Anastasia Pavlyuchenkova (RUS). It was a battle, but in the end the Russian won 7-5, 7-6(1).
Nadal Still On Course For 2nd AO Title
 Rafael Nadal (ESP) dispatched of  Federico Delbonis (ARG) in three sets. Things got a little complicated for the Spaniard in the second set when he failed to capitalize on nine break point opportunities; however, he regained his composure in the third, winning 6-3, 7-6(4), 6-1.
 Donna Vekic (CRO) followed up on her first-round victory by easily dispatching  Alize Cornet (FRA) 6-4, 6-2.
Eighteen-year-old  Iga Swiatek (POL) defeated  Carla Suarez Navarro (ESP) 6-3, 7-5.
 Heather Watson (GBR) could not get by the sixteenth seed, Elise Mertens (BEL); she lost rather easily, 3-6, 0-6.
SOURCE OF IMAGES: serveandrally originals