US Open 2014: Final Grades for Top Stars at Flushing Meadows

Serena Williams had one of the most dominant performances in U.S. Open history, but was it good enough for her earn an "A" grade, or perhaps an "A+"? Should men's champion Marin Cilic get a higher grade than Williams based on his surprising run through a gauntlet of seeded players? What grade should No. 1-ranked Novak Djokovic get after beating Andy Murray but losing to a player who was not even ranked in the top 10 at the time? Finally, how should we rate the performances of the four surprise ...