The wheels have come flying off, figuratively and almost literally, for Juan Martin del Potro in the French Open quarterfinals. After playing nearly flawless tennis and winning two sets versus Roger Federer, del Potro has lost 12 of the last 14 games, dropping the third and fourth sets, 6-2, 6-0. The Argentine received treatment for his knee, while an angry Federer went into Beast Mode.
Here are the only fourth-set stats you need to know:
Winners: Federer 13, Del Potro 2
Unforced Errors: Del Potro 8, Federer 0
Tennis at the French Open is long and arduous. If del Potro regains his form, he can take the match like the third and fourth sets never happened. The fifth set is underway, with Federer winning the first game on his serve.
You can see a full French Open scoreboard at SI.com.