The Australian Open, Wimbledon and French Open champion will play the winner of Friday's match between Stepanek and Russian third seed Nikolay Davydenko, conqueror of Spaniard Feliciano Lopez.
Right across the four Grand Slam events -- the Australian Open, U.S. Open, Wimbledon and French Open -- comparative prize pools have been affected by volatile exchange rates, largely caused by the recession.
Nadal joins Roger Federer, Andre Agassi, Roy Emerson, Rod Laver, Don Budge and Fred Perry in having swept the board, and also becomes the first man since Laver in 1969 to win the French Open, Wimbledon and US Open in the same year.