Rodríguez leads Vuelta after Stage 5

Having obtained the overnight lead of the Vuelta a España on Monday, Alejandro Valverde vowed to do everything in his power to retain it until the final stage in Madrid on September 9, but misfortune dictated otherwise on Tuesday.

At the line on Stage 3's final ascent of Alto de Arrete on Monday, his compatriot Joaquim "Purito" Rodríguez seemed to relax a few meters from the line, allowing Valverde to pip him to the stage win.

"I'm very angry," said Rodríguez afterward. "I lost a stage that was practically in my hands. I knew the profile of the stage and that I had to be in the lead going into the final bend. It was a perfect finish for me, but five meters from the line I stopped pedaling and Valverde beat me by millimeters."

What a difference a day makes.

On Stage 4 of the 2012 Vuelta, a 160.6-kilometer stretch from Barakaldo ending on the steep slopes of Estación de Valdezcaray in La Rioja, Movistar's Valverde found himself caught up in a crash 20 kilometers from the summit, losing 36 seconds overall on the race favorites and the new overnight leader - none other than Katusha rider Rodríguez, who rolled in a minute and four seconds behind, among the chasing pack, to sit atop the general classification.

Valverde may regret not having taken the opportunity to attack earlier as he and Movistar teammates Nairo Quintana and Imanol Erviti became embroiled in the pile-up that also snared Saxo Bank's Nicki Sorensen.

That, though, served to aid Alberto Contador and Chris Froome, the two favorites to ascend the podium in Madrid in September.

"There were many important factors in the stage today," said Contador. "I managed to avoid the crash but the stage was made extremely difficult because of the heat, and myself and Chris Froome were not in great shape at the end. I feel good but the heat is doing a lot of damage in this Vuelta. In any case, the race has only just begun and there are plenty of stages to come."

Simon Clarke, of Orica-Greenedge, took the stage win in 4:30.26, with world time-trial champion Tony Martin harassing him to the line. The German was just two seconds off the wheel of the Australian, who claimed his first ever major stage win.

"I've had so many seconds and thirds and so I'm so happy to finally get my first win as a professional," said Clarke. "I knew Tony would be strong and we worked together on the final climb. He's a very good time trialist but I knew I could take the sprint."

Rodríguez leads Froome by one second in the general classification, with Contador five seconds behind his compatriot in third. Valverde slipped to ninth, 36 seconds off the pace, a loss that could have been worse were it not for the herculean effort of Quintana to drag the Spaniard up Valdezcaray in pursuit of the group containing Contador and Froome.

The Vuelta moves to the flat for Wednesday's Stage 5, a stretch designed for the sprinters that starts and ends in Logroño.

Rodríguez will likely hold onto his lead going into Thursday as the speed merchants vie for a stage win. The last winner of the Logroño stage of the Vuelta to claim the leadership in the same stroke was Denis Menchov, in 2005.