Spain's Alberto Contador stands on the verge of taking overall victory in the 63rd Tour of Spain after finish second in Saturday's penultimate 20th stage, a 17- kilometre individual time trial to Alto de Navcerrada.
The winner of the 2007 Tour de France and this year's Giro d'Italia finished 31 seconds behind stage winner, closest rival and Astana teammate Levi Leipheimer, who won in a time of 33 minutes and 6 seconds, reported dpa.
Alejandro Valverde finished joint second in the same time as Contador, who now goes into the final 102km stage from San Sebastian de los Reyes to Madrid Sunday with a 46-second lead over Leipheimer and barring a crash is virtually assured victory.
Tour de France winner Carlos Sastre finished fourth on the day to lie third overall, 4:12 minutes behind compatriot Contador.