This means that the top seeds in each of the men's and women's draws are still alive into the quarterfinals. It's quite fitting considering the top players on each side have been winning all of the big events lately.
The aforementioned four join Serena Williams, Agnieska Radwanska, Roger Federer and David Ferrer in the business end of the second Grand Slam of the season. Azarenka and Djokovic will be looking to complete the first two legs of the calendar slam.
The top eight players that entered the event (Andy Murray withdrew) are all one round away from facing each other. None of the eight are expected to lose in the next round, but they do face a few potential obstacles.
So, which players can possibly upset the top four seeds getting into the semifinals? The following slides rank the possibility of each of the other eight players still alive scoring an upset in the next round, from least likely to most.