Who won in round 4 and who makes it to quarter finals of the AO 2021

Let’s look at the WTA results first:

• Naomi Osaka defeated Garbiñe Muguruza from Spain with 4:6, 6:4 and 7:5
• The American Serena Williams won over Aryna Sabalenka from Serbia and the world’s number 7 with 6:4, 2:6 and 6:4.
• Simona Halep the world’s number 2 defeated Iga Swiatek with 3:6, 6:1 and 6:1.
• Jennifer Brady from the US won over Donna Vekic from Croatia with 6:1 and 7:5.
• Jessica Pegula defeated Elina Svitolina with 6:4, 3:6 and 6:3
• Su-Wei Hsieh from Taiwan won over Markéta Vondroušová from Czech Republic with 6:4 and 2:6
• Elise Martens from Belgium lost against Karolina Muchova from Czech Republic with 6;6 and 5:7.
• Shelby Rogers was defeated by Ashleigh Barty with 3:6 and 4:6.
  

The following male players have reached the quarter finals of the AO 2021 following the 4^th round: 

• Novak Djokovic, who won over Milos Raonic from Canada with 7:6, 4:6, 6:1 and 6:4.
• Alexander Zverev from Germany, who defeated Dušan Lajovic with 6:4, 7:6 and 6:3.
• Grigor Dimitrov who beat the Austrian Dominic Thiem with 6:4, 6:4 and 6:0.
• Aslan Karatsev the world’s number 113, who won over Félix Auger-Aliassime on rank 21
• With 3:6, 1:6, 6:3, 6:3 and 6:4.
• Andrey Rublev from Russia, who won the first two sets against Casper Ruud with 6:2, 7:6 before Ruud retired. 
• Daniil Medvedev, who won over the American Mackenzie McDonald with 6:4, 6:2 and 6:3.
• Stefanos Tsitsipas was supposed to play against Matteo Berrettini but the Italian retired even before appearing on the court.
• And the last player who is going to be part of the quarter finals is Rafael Nadal, who won over the Italian Fabio Fognini with 6:3, 6:4 and 6:2.