The 22-year-old Spaniard, who arrived in Paris having lost his 33-match winning streak on clay to Roger Federer in Madrid, did not appear to be moving as well as he usually does on the red dirt and he was given a thorough workout by Daniel.

BBC: Nadal & Federer through in Paris

Among the book's most quoted bosses are William Clay Ford of the car company and Roger Enrico of PepsiCo.

ECONOMIST: How corporate bosses think

Put Nadal on a wet clay court with Djokovic or even Gulbis, Roger Federer, or Tomas Berdych and he could suffer.

WSJ: Roland Garros: Return of the French Resistance