Seth Wenig/Associated Press
David Ferrer may well wince when he takes a look at the numbers from his third-round defeat to Gilles Simon.
Indeed, 52 unforced errors, as recorded by the U.S. Open website, is a statistic that will irk the Spaniard, a quarter-finalist last year.
The 6-3, 3-6, 6-1, 6-3 win for Simon, who has never advanced past the fourth-round at Flushing Meadows, was as comprehensive a victory as he is likely to get in the tournament.
Even first-round opponent Radu Albot, the man who denied Great Britain's James Ward a place in the tournament, recorded only 37 unforced errors against Simon.
As with Bouchard, the heat caught up with one of the tournament's stars.
Naila-Jean Meyers of The New York Times wrote that Ferrer is "considered among the fittest players on the tour". However, a moment of brilliance from Simon perfectly encapsulated the fight Ferrer had on his hands, battling the humidity and his French counterpart.
In the third set, Simon unleashed an outrageous forehand down the line when Ferrer should have put him away. As the ball flashed past the 32-year-old, his head dropped and he staggered back to the base line.
It would be foolish to jump to conclusions regarding Ferrer's future, particularly when remembering that he has repeatedly reached the quarter-finals or better in 10 of his last 12 Grand Slam appearances.
However, the fact is that Ferrer didn't take either of the two opportunities he had for break points in the final two sets.
Simon took four out of five of his potential break points, adding to the theory that the heat took its toll on Ferrer more than his opponent in the last hour and a half.