Favorite: Nadal (37%)
Contender: Wawrinka (20%)
Dark Horse: Sock (8%)
1st Round Upset Alert: Fernando Verdasco is a tough matchup for Rafael Nadal in the first round of a Grand Slam. After Nadal won the first 14 matches, Verdasco has split the last 4 with Nadal. This includes beating Nadal on hard court last year at the 2015 ATP World Tour Masters Miami.
Prediction: Nadal is the mild favorite but this really is the most open quarter. There are many hard hitting, aggressive players that can go hot or cold including Nadal (5), Wawrinka (4), Sock (25), Raonic (13), Anderson (23) and Monfils (23). This quarter could provide some of the best 3rd and 4th round matchups.