US OPEN, USA
 Stan Wawrinka (SUI) had a battle on his hands against Daniel Evans (GBR), who came pretty close to upsetting him. Wawrinka showed his fighting spirit by coming back to win 4-6, 6-3, 6-7(6), 7-6(8), 6-2.
Juan Martin Del Potro (ARG) continued his summer comeback with the upset of his second seeded player. Today it was  David Ferrer (ESP) who had the misfortune of playing him and he lost 6-7(3), 2-6, 3-6. Next up for Del Potro is  Dominic Thiem (AUT).
I went to bed thinking that  Nick Kyrgios (AUS) had this in the bag and woke up later to see he had retired, losing to Illya Marchenko (UKR). Marchenko is into the fourth round of a Major for the first time in his career with the 4-6, 6-4, 6-1 victory.
 Serena Williams (USA) had very little trouble with Johanna Larsson (SWE) once she got used to the day conditions and won 6-2, 6-1.
 Agnieszka Radwanska (POL) also had an easy victory over  Caroline Garcia (FRA), winning 6-2, 6-3.
 Simona Halep (ROU) had to battle back in the third set from a 1-3 deficit to beat  Timea Babos (HUN) 6-1, 2-6, 6-4.
Despite the score, it was a battle for  Karolina Pliskova (CZE) to defeat  Anastasia Pavlyuchenkova (RUS) 6-2, 6-4. Next up for Pliskova is  Venus Williams (USA), who had an easy 6-1, 6-2 victory over Laura Siegemund (GBR).
 Carla Suarez Navarro (ESP) had a fairly straight forward 6-4, 6-3 win over  Elena Vesnina (RUS).
NOTE: 4 Americans remain in the draw: three women, Keys and the Williams sisters; and one man, Sock.