Nadal set to top world rankings

Rafael Nadal will return to number one in the world rankings on Monday after reaching the final of the China Open. Nadal, 27, was leading fourth seed Tomas Berdych 4-2 in the first set of their semi-final when his Czech opponent retired with a back injury. "This is a great year, one of the best of my career," said the Spaniard, who won the French Openand US Openand was last top of the rankingsin July 2011.