Armstrong, who was stripped of his seven Tour de France victories after doping accusations, needled his way into the discussion after Froome surged to a dominant win in the first mountain stage of the 2015 race.
The Englishman boosted his lead over second placed Tejay Van Garderen to 2 min 52 seconds while Nairo Quintana is third 3 min 9 seconds back.
Both Quintana and Van Garderen struggled on the stage, with prerace favourite Alberto Contador losing 2 min 50 and last year’s winner Vincenzo Nibali dropping 4 min 25.
Froome’s teammate Richie Porte finished second on the stage 59 seconds behind his leader.
It was all a bit suspect for Armstrong, who offered these juicy tweets in the aftermath.
Getting lots of questions regarding today's first mountain stage @letour. Some thoughts to follow.
— Lance Armstrong (@lancearmstrong) July 14, 20151. Clearly Froome/Porte/Sky are very strong. Too strong to be clean? Don't ask me, I have no clue.
— Lance Armstrong (@lancearmstrong) July 14, 20152. The first mtn stage is always unpredictable. The day after a rest day is also unpredictable. Combine the two and its 10x.
— Lance Armstrong (@lancearmstrong) July 14, 20153. Nibali's tour looks to be over.
— Lance Armstrong (@lancearmstrong) July 14, 2015Finally, this @letour is NOT over. Those initial hard efforts that Sky put out today tend to add up and there is a ton of racing left.
— Lance Armstrong (@lancearmstrong) July 14, 2015Despite what his first tweet looked like, Armstrong denied he was accusing Sky of doping.
He later responded to a critic, saying “I’m not accusing anyone. In fact, quite the opposite. I’m not interested (nor do I have the credibility) to opine there.”
True, he doesn’t.
. @danieljcastille I'm not accusing anyone In fact, quite the opposite. I'm not interested (nor do I have the credibility) to opine there.
— Lance Armstrong (@lancearmstrong) July 14, 2015