Guillén predicting a nail-biting Vuelta a España

The final 2010 Vuelta a Espana podium: Ezequiel Mosquera, Vincenzo Nibali and Peter Velits.

The final 2010 Vuelta a Espana podium: Ezequiel Mosquera, Vincenzo Nibali and Peter Velits. (Image credit: Bettini Photo)

Ten days out from the start of the Vuelta a España, the final grand tour of 2011, race director Javier Guillén says it is "impossible to predict" who will prevail once the race reaches its conclusion in Madrid on September 11.