Sastre had started the stage 1 minute, 24 seconds ahead of Frank Schleck of Luxembourg.
The title contenders were content to let the breakaway riders go Thursday. The three-week race ends Sunday in Paris.
Burghardt wins 18th Stage of Tour de France
SAINT-ETIENNE, France (AP) - July 24, 2008
Burghardt and Carlos Barredo of Spain finished with more than a
nine-minute lead on the main pack, including the top title
contenders, after the 122-mile ride from Bourg-d'Oisans to
Saint-Etienne.
