Originally Posted by
MinnMan
I don't know if this is all of the explanation. The Giro was more than 3 months ago.
Contador won the Giro and the TdF in 2011, so it's possible for top riders to compete in more than one grand tour in a season (though maybe he was doping).
He won the Giro but was later disqualified, he didn't win the TdF in 2011 Cadel Evans did.