Ullrich throws down gauntlet
Ullrich, the 29-year-old winner of the 1997 Tour, blitzed his rivals to win the race's 12th stage, a 47km time-trial from Gaillac to Cap'Decouverte.
Armstrong came in second on the day but 1:36 behind the German, the only man to break the hour mark with a blistering time of 58:32.