Spanish cyclist Daniel Moreno of Team Katusha won a mountainous fourth stage of the 2011 Vuelta a Espana to move 43 seconds behind new overall leader Sylvain Chavanel of Team QuickStep.

Moreno hung on to the wheel of Saxo Bank-SunGard's Chris Anker Sørensen as the pair charged toward the close of the 105-mile route, including the last 14 miles uphill.

Moreno swung past his Danish rival before the final bend and pulled away for a three-second victory, crossing the finish line at the top of the Sierra Nevada ski resort in 04 hours, 51 minutes, 53 seconds.

French cyclist Chavanel leads the Vuelta a Espana overall with a time of 13:19:09 for QuickStep, ahead of Moreno. Team Leopard-Trek's Jakob Fuglsang of Denmark and French cyclist Maxime Monfort were next, trailing by 49 seconds.

Watch video highlights from all stages of the 2011 Vuelta a Espana in our video section.